General Properties

Determines the number of times the inverse kinematics solver calls its Pull engine to resolve the relative Pull values of your character’s Nodes and Effectors.

Higher values produce more precise results, but require more CPU resources.

When HumanIK bends a character with many spine Nodes, each Node typically bends freely when contributing to the overall IK solution, making the character appear very flexible. This property allows you to shift rotation from additional spine bones to the base spine Node. This makes the spine appear stiffer.

Higher values shift rotation progressively toward the base spine Node; at a value of 1.0 only the base spine Node rotates, and additional spine Nodes remain fixed relative to the base spine Node. Lower values shift rotation more evenly across all spine Nodes; a value of 0.0 applies equal rotation to all spine Nodes.

When the HumanIK Reach Rotation engine causes the head to rotate to a new orientation, this property controls whether that rotation is confined to the last (highest) Node in the character’s neck, or whether it is balanced across all Nodes in the neck.

Higher values shift rotation progressively toward the last (highest) neck Node; at a value of 1.0 only the last Node rotates, and additional neck Nodes remain fixed. Lower values shift rotation more evenly across all neck Nodes; a value of 0.0 applies equal rotation to all neck Nodes.

Controls the flexibility of the character’s collar Nodes (the LeftCollarNodeId, RightCollarNodeId, LeftCollarExtraNodeId and RightCollarExtraNodeId Nodes) when rotating around the X axis.

Higher values cause the collar to be stiffer and less likely to rotate around the X axis; lower values cause the collar to be more flexible and more likely to rotate around the X axis.

Controls the flexibility of the character’s collar Nodes (the LeftCollarNodeId, RightCollarNodeId, LeftCollarExtraNodeId and RightCollarExtraNodeId Nodes) when rotating around the Y axis.

Higher values cause the collar to be stiffer and less likely to rotate around the Y axis; lower values cause the collar to be more flexible and more likely to rotate around the Y axis.

Controls the flexibility of the character’s collar Nodes (the LeftCollarNodeId, RightCollarNodeId, LeftCollarExtraNodeId and RightCollarExtraNodeId Nodes) when rotating around the Z axis.

Higher values cause the collar to be stiffer and less likely to rotate around the Z axis; lower values cause the collar to be more flexible and more likely to rotate around the Z axis.

Determines the maximum angle of extension for the left arm along its yaw axis.

The default value of 180.0 allows the arm to straighten completely, but not to bend backward. Lower values prevent the arm from straightening completely.

Applies a stiffness factor that progressively dampens the extension of the left elbow as it approaches its maximum extension angle, preventing the limb from snapping.

Higher values make the left elbow extend more gradually; lower values make the limb extend more rapidly. The default value of 50.0 corrects most limb snapping, and should be appropriate in most cases.

Applies a stiffness factor that dampens the compression or bending inward of the left elbow.

Higher values cause the left elbow to resist being bent. Setting the maximum value forces the elbow to keep its original FK angle, which may cause the character’s chest to move instead.

Lower values allow the left elbow to bend inward more freely. Setting the minimum value allows completely free movement.

Determines whether or not the inverse kinematics solver forbids rotations of the left elbow around its pitch axis, preventing it from bending sideways in an unrealistic manner.

When this property is de-activated, the inverse kinematics solver normally discourages pitch rotations on the elbow in the poses it generates for your characters. However, pitch rotations may be allowed in certain cases—for example, if you directly assign a Reach Rotation and a pitch rotation to the left elbow Effector.

When this property is activated, all pitch rotations above 15 degrees are forbidden, even if you attempt to assign a pitch rotation to the Effector directly. Instead, in this case, the shoulder will rotate up to 90 degrees in order to make the forearm point in the requested orientation.

Determines the maximum angle of extension for the right arm along its yaw axis.

The default value of 180.0 allows the arm to straighten completely, but not to bend backward. Lower values prevent the arm from straightening completely.

Applies a stiffness factor that progressively dampens the extension of the right elbow as it approaches its maximum extension angle, preventing the limb from snapping.

Higher values make the right elbow extend more gradually; lower values make the limb extend more rapidly. The default value of 50.0 corrects most limb snapping, and should be appropriate in most cases.

Applies a stiffness factor that dampens the compression or bending inward of the right elbow.

Higher values cause the right elbow to resist being bent. Setting the maximum value forces the elbow to keep its original FK angle, which may cause the character’s chest to move instead.

Lower values allow the right elbow to bend inward more freely. Setting the minimum value allows completely free movement.

Determines whether or not the inverse kinematics solver forbids rotations of the right elbow around its pitch axis, preventing it from bending sideways in an unrealistic manner.

When this property is de-activated, the inverse kinematics solver normally discourages pitch rotations on the elbow in the poses it generates for your characters. However, pitch rotations may be allowed in certain cases—for example, if you directly assign a Reach Rotation and a pitch rotation to the right elbow Effector.

When this property is activated, all pitch rotations above 15 degrees are forbidden, even if you attempt to assign a pitch rotation to the Effector directly. Instead, in this case, the shoulder will rotate up to 90 degrees in order to make the forearm point in the requested orientation.

Determines the maximum angle of extension for the left leg along its yaw axis.

The default value of 180.0 allows the leg to straighten completely, but not to bend backward. Lower values prevent the leg from straightening completely.

Applies a stiffness factor that progressively dampens the extension of the left knee as it approaches its maximum extension angle, preventing the limb from snapping.

Higher values make the left knee extend more gradually; lower values make the limb extend more rapidly. The default value of 50.0 corrects most limb snapping, and should be appropriate in most cases.

Applies a stiffness factor that dampens the compression or bending inward of the left knee.

Higher values cause the left knee to resist being bent. Setting the maximum value forces the knee to keep its original FK angle, which may cause the character’s chest to move instead.

Lower values allow the left knee to bend inward more freely. Setting the minimum value allows completely free movement.

Determines whether or not the inverse kinematics solver forbids rotations of the left knee around its pitch axis, preventing it from bending sideways in an unrealistic manner.

When this property is de-activated, the inverse kinematics solver normally discourages pitch rotations on the knee in the poses it generates for your characters. However, pitch rotations may be allowed in certain cases—for example, if you directly assign a Reach Rotation and a pitch rotation to the left knee Effector.

When this property is activated, all pitch rotations above 15 degrees are forbidden, even if you attempt to assign a pitch rotation to the Effector directly. Instead, in this case, the hip will rotate up to 90 degrees in order to make the lower leg point in the requested orientation.

Determines the maximum angle of extension for the right leg along its yaw axis.

The default value of 180.0 allows the leg to straighten completely, but not to bend backward. Lower values prevent the leg from straightening completely.

Applies a stiffness factor that progressively dampens the extension of the right knee as it approaches its maximum extension angle, preventing the limb from snapping.

Higher values make the right knee extend more gradually; lower values make the limb extend more rapidly. The default value of 50.0 corrects most limb snapping, and should be appropriate in most cases.

Applies a stiffness factor that dampens the compression or bending inward of the right knee.

Higher values cause the right knee to resist being bent. Setting the maximum value forces the knee to keep its original FK angle, which may cause the character’s chest to move instead.

Lower values allow the right knee to bend inward more freely. Setting the minimum value allows completely free movement.

Determines whether or not the inverse kinematics solver forbids rotations of the right knee around its pitch axis, preventing it from bending sideways in an unrealistic manner.

When this property is de-activated, the inverse kinematics solver normally discourages pitch rotations on the knee in the poses it generates for your characters. However, pitch rotations may be allowed in certain cases—for example, if you directly assign a Reach Rotation and a pitch rotation to the right knee Effector.

When this property is activated, all pitch rotations above 15 degrees are forbidden, even if you attempt to assign a pitch rotation to the Effector directly. Instead, in this case, the hip will rotate up to 90 degrees in order to make the lower leg point in the requested orientation.

When the left ankle rotates, this parameter determines the extent to which the left hip rotates in order to make the left knee follow the orientation of the foot.

With the default value of 0.0, the ankle rotates completely independently of the knee. The foot can point in any direction without constraining the position or rotation of the knee, which can create unrealistic positions. For example, the left foot might point 90 degrees inward toward the right foot while the left knee continues to point straight ahead.

Increasing the value of this parameter applies a percentage of the ankle’s rotation back to the hip, keeping the knee more in line with the orientation of the foot. Setting the value of this parameter to its maximum value causes the knee to stay completely in line with the orientation of the foot as the ankle rotates.

When the right ankle rotates, this parameter determines the extent to which the right hip rotates in order to make the right knee follow the orientation of the foot.

With the default value of 0.0, the ankle rotates completely independently of the knee. The foot can point in any direction without constraining the position or rotation of the knee, which can create unrealistic positions. For example, the right foot might point 90 degrees inward toward the left foot while the right knee continues to point straight ahead.

Increasing the value of this parameter applies a percentage of the ankle’s rotation back to the hip, keeping the knee more in line with the orientation of the foot. Setting the value of this parameter to its maximum value causes the knee to stay completely in line with the orientation of the foot as the ankle rotates.

Determines the method used by the HumanIK inverse kinematics solver to apply roll rotations from a Node to its associated Roll Node—for example, from the LeftElbowNodeId Node to the LeftElbowRollNodeId Node.

Determines whether or not rotations of the LeftHipNodeId around its roll axis are extracted and applied to the next Node down the joint chain. The rotation is applied to the LeftHipRollNodeId if characterized, or to the LeftKneeNodeId if not.

When this property is on, its value determines what percentage of the original roll rotation is extracted from the original Node and applied instead to its child Node.

At 1.0, all of the roll is transferred from the original Node to its child.

At 0.5, the roll is equally distributed between the original Node and its child.

At 0.0, none of the roll is transferred to the child, moving only the original Node.

Determines whether or not rotations of the LeftHipRollNodeId around its roll axis are extracted and applied to its child Node: LeftKneeNodeId. The value of this property determines the percentage of the original roll rotation to be extracted from the roll Node and applied instead to its child Node.

At 0.0, none of the roll is transferred to the child, moving only the roll Node.

At 0.5, the roll is equally distributed between the roll Node and its child.

At 1.0, all of the roll is transferred from the roll Node to its child.

Values larger than1.0 "over-extract" the rotation: they extract more rotation from the roll Node than was initially applied to it from the parent Node. This effectively causes the roll Node to rotate in the opposite direction to its parent Node. All rotation extracted from the roll Node is then applied to the child Node in the original direction of rotation of the parent Node. For example, suppose that you have a roll Node with 90 degrees of roll rotation applied to it (extracted from its parent), and you set this value to 1.5 for that roll Node. The roll Node is rotated back by 135 degrees (1.5 * 90), which results in an apparent rotation of 45 degrees in the opposite direction. The child of the roll Node is then rotated by 135 degrees relative to the new rotation of the roll Node, causing it to exhibit the original rotation of the roll Node.

Determines whether or not rotations of the LeftKneeNodeId around its roll axis are extracted and applied to the next Node down the joint chain. The rotation is applied to the LeftKneeRollNodeId if characterized, or to the LeftAnkleNodeId if not.

When this property is on, its value determines what percentage of the original roll rotation is extracted from the original Node and applied instead to its child Node.

At 1.0, all of the roll is transferred from the original Node to its child.

At 0.5, the roll is equally distributed between the original Node and its child.

At 0.0, none of the roll is transferred to the child, moving only the original Node.

Determines whether or not rotations of the LeftKneeRollNodeId around its roll axis are extracted and applied to its child Node: LeftAnkleNodeId. The value of this property determines the percentage of the original roll rotation to be extracted from the roll Node and applied instead to its child Node.

At 0.0, none of the roll is transferred to the child, moving only the roll Node.

At 0.5, the roll is equally distributed between the roll Node and its child.

At 1.0, all of the roll is transferred from the roll Node to its child.

Values larger than1.0 "over-extract" the rotation: they extract more rotation from the roll Node than was initially applied to it from the parent Node. This effectively causes the roll Node to rotate in the opposite direction to its parent Node. All rotation extracted from the roll Node is then applied to the child Node in the original direction of rotation of the parent Node. For example, suppose that you have a roll Node with 90 degrees of roll rotation applied to it (extracted from its parent), and you set this value to 1.5 for that roll Node. The roll Node is rotated back by 135 degrees (1.5 * 90), which results in an apparent rotation of 45 degrees in the opposite direction. The child of the roll Node is then rotated by 135 degrees relative to the new rotation of the roll Node, causing it to exhibit the original rotation of the roll Node.

Determines whether or not rotations of the RightHipNodeId around its roll axis are extracted and applied to the next Node down the joint chain. The rotation is applied to the RightHipRollNodeId if characterized, or to the RightKneeNodeId if not.

When this property is on, its value determines what percentage of the original roll rotation is extracted from the original Node and applied instead to its child Node.

At 1.0, all of the roll is transferred from the original Node to its child.

At 0.5, the roll is equally distributed between the original Node and its child.

At 0.0, none of the roll is transferred to the child, moving only the original Node.

Determines whether or not rotations of the RightHipRollNodeId around its roll axis are extracted and applied to its child Node: RightKneeNodeId. The value of this property determines the percentage of the original roll rotation to be extracted from the roll Node and applied instead to its child Node.

At 0.0, none of the roll is transferred to the child, moving only the roll Node.

At 0.5, the roll is equally distributed between the roll Node and its child.

At 1.0, all of the roll is transferred from the roll Node to its child.

Values larger than1.0 "over-extract" the rotation: they extract more rotation from the roll Node than was initially applied to it from the parent Node. This effectively causes the roll Node to rotate in the opposite direction to its parent Node. All rotation extracted from the roll Node is then applied to the child Node in the original direction of rotation of the parent Node. For example, suppose that you have a roll Node with 90 degrees of roll rotation applied to it (extracted from its parent), and you set this value to 1.5 for that roll Node. The roll Node is rotated back by 135 degrees (1.5 * 90), which results in an apparent rotation of 45 degrees in the opposite direction. The child of the roll Node is then rotated by 135 degrees relative to the new rotation of the roll Node, causing it to exhibit the original rotation of the roll Node.

Determines whether or not rotations of the RightKneeNodeId around its roll axis are extracted and applied to the next Node down the joint chain. The rotation is applied to the RightKneeRollNodeId if characterized, or to the RightAnkleNodeId if not.

When this property is on, its value determines what percentage of the original roll rotation is extracted from the original Node and applied instead to its child Node.

At 1.0, all of the roll is transferred from the original Node to its child.

At 0.5, the roll is equally distributed between the original Node and its child.

At 0.0, none of the roll is transferred to the child, moving only the original Node.

Determines whether or not rotations of the RightKneeRollNodeId around its roll axis are extracted and applied to its child Node: RightAnkleNodeId. The value of this property determines the percentage of the original roll rotation to be extracted from the roll Node and applied instead to its child Node.

At 0.0, none of the roll is transferred to the child, moving only the roll Node.

At 0.5, the roll is equally distributed between the roll Node and its child.

At 1.0, all of the roll is transferred from the roll Node to its child.

Values larger than1.0 "over-extract" the rotation: they extract more rotation from the roll Node than was initially applied to it from the parent Node. This effectively causes the roll Node to rotate in the opposite direction to its parent Node. All rotation extracted from the roll Node is then applied to the child Node in the original direction of rotation of the parent Node. For example, suppose that you have a roll Node with 90 degrees of roll rotation applied to it (extracted from its parent), and you set this value to 1.5 for that roll Node. The roll Node is rotated back by 135 degrees (1.5 * 90), which results in an apparent rotation of 45 degrees in the opposite direction. The child of the roll Node is then rotated by 135 degrees relative to the new rotation of the roll Node, causing it to exhibit the original rotation of the roll Node.

Determines whether or not rotations of the LeftShoulderNodeId around its roll axis are extracted and applied to the next Node down the joint chain. The rotation is applied to the LeftShoulderRollNodeId if characterized, or to the LeftElbowNodeId if not.

When this property is on, its value determines what percentage of the original roll rotation is extracted from the original Node and applied instead to its child Node.

At 1.0, all of the roll is transferred from the original Node to its child.

At 0.5, the roll is equally distributed between the original Node and its child.

At 0.0, none of the roll is transferred to the child, moving only the original Node.

Determines whether or not rotations of the LeftShoulderRollNodeId around its roll axis are extracted and applied to its child Node: LeftElbowNodeId. The value of this property determines the percentage of the original roll rotation to be extracted from the roll Node and applied instead to its child Node.

At 0.0, none of the roll is transferred to the child, moving only the roll Node.

At 0.5, the roll is equally distributed between the roll Node and its child.

At 1.0, all of the roll is transferred from the roll Node to its child.

Values larger than1.0 "over-extract" the rotation: they extract more rotation from the roll Node than was initially applied to it from the parent Node. This effectively causes the roll Node to rotate in the opposite direction to its parent Node. All rotation extracted from the roll Node is then applied to the child Node in the original direction of rotation of the parent Node. For example, suppose that you have a roll Node with 90 degrees of roll rotation applied to it (extracted from its parent), and you set this value to 1.5 for that roll Node. The roll Node is rotated back by 135 degrees (1.5 * 90), which results in an apparent rotation of 45 degrees in the opposite direction. The child of the roll Node is then rotated by 135 degrees relative to the new rotation of the roll Node, causing it to exhibit the original rotation of the roll Node.

Determines whether or not rotations of the LeftElbowNodeId around its roll axis are extracted and applied to the next Node down the joint chain. The rotation is applied to the LeftElbowRollNodeId if characterized, or to the LeftWristNodeId if not.

When this property is on, its value determines what percentage of the original roll rotation is extracted from the original Node and applied instead to its child Node.

At 1.0, all of the roll is transferred from the original Node to its child.

At 0.5, the roll is equally distributed between the original Node and its child.

At 0.0, none of the roll is transferred to the child, moving only the original Node.

Determines whether or not rotations of the LeftElbowRollNodeId around its roll axis are extracted and applied to its child Node: LeftWristNodeId. The value of this property determines the percentage of the original roll rotation to be extracted from the roll Node and applied instead to its child Node.

At 0.0, none of the roll is transferred to the child, moving only the roll Node.

At 0.5, the roll is equally distributed between the roll Node and its child.

At 1.0, all of the roll is transferred from the roll Node to its child.

Values larger than1.0 "over-extract" the rotation: they extract more rotation from the roll Node than was initially applied to it from the parent Node. This effectively causes the roll Node to rotate in the opposite direction to its parent Node. All rotation extracted from the roll Node is then applied to the child Node in the original direction of rotation of the parent Node. For example, suppose that you have a roll Node with 90 degrees of roll rotation applied to it (extracted from its parent), and you set this value to 1.5 for that roll Node. The roll Node is rotated back by 135 degrees (1.5 * 90), which results in an apparent rotation of 45 degrees in the opposite direction. The child of the roll Node is then rotated by 135 degrees relative to the new rotation of the roll Node, causing it to exhibit the original rotation of the roll Node.

Determines whether or not rotations of the RightShoulderNodeId around its roll axis are extracted and applied to the next Node down the joint chain. The rotation is applied to the RightShoulderRollNodeId if characterized, or to the RightElbowNodeId if not.

When this property is on, its value determines what percentage of the original roll rotation is extracted from the original Node and applied instead to its child Node.

At 1.0, all of the roll is transferred from the original Node to its child.

At 0.5, the roll is equally distributed between the original Node and its child.

At 0.0, none of the roll is transferred to the child, moving only the original Node.

Determines whether or not rotations of the RightShoulderRollNodeId around its roll axis are extracted and applied to its child Node: RightElbowNodeId. The value of this property determines the percentage of the original roll rotation to be extracted from the roll Node and applied instead to its child Node.

At 0.0, none of the roll is transferred to the child, moving only the roll Node.

At 0.5, the roll is equally distributed between the roll Node and its child.

At 1.0, all of the roll is transferred from the roll Node to its child.

Values larger than1.0 "over-extract" the rotation: they extract more rotation from the roll Node than was initially applied to it from the parent Node. This effectively causes the roll Node to rotate in the opposite direction to its parent Node. All rotation extracted from the roll Node is then applied to the child Node in the original direction of rotation of the parent Node. For example, suppose that you have a roll Node with 90 degrees of roll rotation applied to it (extracted from its parent), and you set this value to 1.5 for that roll Node. The roll Node is rotated back by 135 degrees (1.5 * 90), which results in an apparent rotation of 45 degrees in the opposite direction. The child of the roll Node is then rotated by 135 degrees relative to the new rotation of the roll Node, causing it to exhibit the original rotation of the roll Node.

Determines whether or not rotations of the RightElbowNodeId around its roll axis are extracted and applied to the next Node down the joint chain. The rotation is applied to the RightElbowRollNodeId if characterized, or to the RightWristNodeId if not.

When this property is on, its value determines what percentage of the original roll rotation is extracted from the original Node and applied instead to its child Node.

At 1.0, all of the roll is transferred from the original Node to its child.

At 0.5, the roll is equally distributed between the original Node and its child.

At 0.0, none of the roll is transferred to the child, moving only the original Node.

Determines whether or not rotations of the RightElbowRollNodeId around its roll axis are extracted and applied to its child Node: RightWristNodeId. The value of this property determines the percentage of the original roll rotation to be extracted from the roll Node and applied instead to its child Node.

At 0.0, none of the roll is transferred to the child, moving only the roll Node.

At 0.5, the roll is equally distributed between the roll Node and its child.

At 1.0, all of the roll is transferred from the roll Node to its child.

Values larger than1.0 "over-extract" the rotation: they extract more rotation from the roll Node than was initially applied to it from the parent Node. This effectively causes the roll Node to rotate in the opposite direction to its parent Node. All rotation extracted from the roll Node is then applied to the child Node in the original direction of rotation of the parent Node. For example, suppose that you have a roll Node with 90 degrees of roll rotation applied to it (extracted from its parent), and you set this value to 1.5 for that roll Node. The roll Node is rotated back by 135 degrees (1.5 * 90), which results in an apparent rotation of 45 degrees in the opposite direction. The child of the roll Node is then rotated by 135 degrees relative to the new rotation of the roll Node, causing it to exhibit the original rotation of the roll Node.

This property enables and disables realistic arm solving.

Sets the percentage of the arm or leg length at which those limbs can begin to stretch.

Sets the percentage of the arm or leg length at which those limbs will stop stretching freely. This is a soft limit; above this threshold, the limb will continue to stretch at a reduced rate in order to avoid popping.

Sets the contribution of the Squash ’n’ Stretch engine when solving the left arm, relative to alternate ways of making the left wrist reach its target position (such as using the Pull engine, or changing the angle of the elbow).

A value of 0.0 effectively disables Squash ’n’ Stretch for the limb.

A value of 1.0 uses Squash ’n’ Stretch as much as possible. However, note that the alternate ways of making the left wrist reach its target position will still contribute to the final solution somewhat.

Sets the contribution of the Squash ’n’ Stretch engine when solving the right arm, relative to alternate ways of making the right wrist reach its target position (such as using the Pull engine, or changing the angle of the elbow).

A value of 0.0 effectively disables Squash ’n’ Stretch for the limb.

A value of 1.0 uses Squash ’n’ Stretch as much as possible. However, note that the alternate ways of making the right wrist reach its target position will still contribute to the final solution somewhat.

Sets the contribution of the Squash ’n’ Stretch engine when solving the left leg, relative to alternate ways of making the left ankle reach its target position (such as using the Pull engine, or changing the angle of the knee).

A value of 0.0 effectively disables Squash ’n’ Stretch for the limb.

A value of 1.0 uses Squash ’n’ Stretch as much as possible. However, note that the alternate ways of making the left ankle reach its target position will still contribute to the final solution somewhat.

Sets the contribution of the Squash ’n’ Stretch engine when solving the right leg, relative to alternate ways of making the right ankle reach its target position (such as using the Pull engine, or changing the angle of the knee).

A value of 0.0 effectively disables Squash ’n’ Stretch for the limb.

A value of 1.0 uses Squash ’n’ Stretch as much as possible. However, note that the alternate ways of making the right ankle reach its target position will still contribute to the final solution somewhat.

Determines whether the compression and expansion of the arms and legs is achieved through changing the translations of the Nodes, changing the scale of the Nodes, or a blend of the two.

A value of 0.0 keeps the scale of the Nodes in the arms and legs the same at all times. Squash ’n’ Stretch is achieved by changing the translations and rotations of the Nodes.

A value of 1.0 keeps the translations and rotations of the Nodes in the arms and legs the same in local space. Squash ’n’ Stretch is achieved by changing the scaling of the Nodes.

A value between 0.0 and 1.0 interpolates the scaling of the Nodes between these extremes.

Sets the contribution of the Squash ’n’ Stretch engine when solving the spine, relative to alternate ways of making the ChestEndEffectorId reach its target position (such as using the Pull engine, or changing the angle of the Nodes in the spine).

A value of 0.0 effectively disables Squash ’n’ Stretch for the limb.

A value of 1.0 uses Squash ’n’ Stretch as much as possible. However, note that the alternate ways of making the chest reach its target position will still contribute to the final solution somewhat.

Determines how much of the compression and expansion that is applied to the spine is applied also to the child Nodes of the spine:

NeckNodeId

LeftCollarNodeId if characterized, or LeftShoulderNodeId if not

RightCollarNodeId if characterized, or RightShoulderNodeId if not

Note that the scale of these Nodes is never changed, even when the HIKSnSScaleSpine property is set to a positive value. The compression and expansion of the spine children is always achieved through translating the Nodes rather than scaling them.

Determines whether the compression and expansion of the spine is achieved through changing the translations of the Nodes, changing the scale of the Nodes, or a blend of the two.

A value of 0.0 keeps the scale of the Nodes in the spine the same at all times. Squash ’n’ Stretch is achieved by changing the translations and rotations of the Nodes.

A value of 1.0 keeps the translations and rotations of the Nodes in the spine the same in local space. Squash ’n’ Stretch is achieved by changing the scaling of the Nodes.

A value between 0.0 and 1.0 interpolates the scaling of the Nodes between these extremes.

Sets the contribution of the Squash ’n’ Stretch engine when solving the neck, relative to alternate ways of making the HeadEffectorId reach its target position (such as using the Pull engine, or changing the angle of the Nodes in the neck).

A value of 0.0 effectively disables Squash ’n’ Stretch for the limb.

A value of 1.0 uses Squash ’n’ Stretch as much as possible. However, note that the alternate ways of making the head reach its target position will still contribute to the final solution somewhat.

Determines whether the compression and expansion of the neck is achieved through changing the translations of the Nodes, changing the scale of the Nodes, or a blend of the two.

A value of 0.0 keeps the scale of the Nodes in the neck the same at all times. Squash ’n’ Stretch is achieved by changing the translations and rotations of the Nodes.

A value of 1.0 keeps the translations and rotations of the Nodes in the neck the same in local space. Squash ’n’ Stretch is achieved by changing the scaling of the Nodes.

A value between 0.0 and 1.0 interpolates the scaling of the Nodes between these extremes.

This property is used in conjunction with the HIKSnSReachChestEnd and HIKSnSReachHead properties. It indicates whether or not the reach should be smoothed.

Determines the percentage of the rotation applied to the shoulders (the LeftShoulderNodeId and RightShoulderNodeId Nodes) that is extracted from the shoulder and applied instead to the collar bones (the LeftCollarNodeId and RightCollarNodeId Nodes), to simulate the behavior of human shoulders when the arms are raised.

When the character has extra collar bones in its skeleton (defined by the LeftCollarExtraNodeId and RightCollarExtraNodeId Nodes respectively), this property controls how HumanIK spreads rotations and translations across those collar Nodes.

Lower values cause movements to be shifted towards the base collar bones (the LeftCollarNodeId and RightCollarNodeId Nodes); higher values cause movements to be shifted progressively towards the extra collar bones.

If your character has a special Node designated for maintaining the translation of its hips (the HipsTranslationId Node), this property determines whether or not rotations applied to your character’s hips (the LeftHipNodeId and RightHipNodeId Nodes) are also applied to the special translation Node.

Determines the extent to which the HumanIK inverse kinematics solver attempts to keep the character’s center of gravity, its hips, balanced between the character’s feet.

Higher values constrain the movement of the hips, keeping them in between the positions of the character’s feet. Lower values allow the hips to move freely to any location, regardless of the location of the feet; this may place the character in a pose that would cause a real human to overbalance due to the force of gravity.

This property is used only when the Resist value for the translation of the hips, set by the HIKCtrlResistHipsPositionId property, is greater than zero.

When activated, this property locks the position of the character's hips on the X axis to the position of the hips in its default T-stance.

When activated, this property locks the position of the character's hips on the Y axis to the position of the hips in its default T-stance.

When activated, this property locks the position of the character's hips on the Z axis to the position of the hips in its default T-stance.

By default, the HipsEffectorId controls an imaginary point on the skeleton located half-way between the positions of the LeftHipNodeId and RightHipNodeId when your character stands in its default T-stance. This parameter applies an offset to this imaginary point along the X axis.

By default, the HipsEffectorId controls an imaginary point on the skeleton located half-way between the positions of the LeftHipNodeId and RightHipNodeId when your character stands in its default T-stance. This parameter applies an offset to this imaginary point along the Y axis.

By default, the HipsEffectorId controls an imaginary point on the skeleton located half-way between the positions of the LeftHipNodeId and RightHipNodeId when your character stands in its default T-stance. This parameter applies an offset to this imaginary point along the Z axis.

By default, the ChestEndEffectorId controls an imaginary point on the skeleton located half-way between the positions of the LeftShoulderNodeId and RightShoulderNodeId when your character stands in its default T-stance. This parameter applies an offset to this imaginary point along the X axis.

When retargeting, this offset is used only when the HIKReachActorChestId property is set to a non-zero value for the target character.

By default, the ChestEndEffectorId controls an imaginary point on the skeleton located half-way between the positions of the LeftShoulderNodeId and RightShoulderNodeId when your character stands in its default T-stance. This parameter applies an offset to this imaginary point along the Y axis.

When retargeting, this offset is used only when the HIKReachActorChestId property is set to a non-zero value for the target character.

By default, the ChestEndEffectorId controls an imaginary point on the skeleton located half-way between the positions of the LeftShoulderNodeId and RightShoulderNodeId when your character stands in its default T-stance. This parameter applies an offset to this imaginary point along the Z axis.

When retargeting, this offset is used only when the HIKReachActorChestId property is set to a non-zero value for the target character. It affects the mass center of the shoulders, and allows for a more realistic retargeting when the shoulders of the source and destination characters do not match.