When you create a Blend Shape deformer for a base object (see Create blend shape deformers), it creates a blendShape node, which blends in specified amounts of each target shape to the base shape on that object.
Each blendShape node on an object has its own set of target shapes, and blends only those target shapes that belong to it. Every target shape has its own weight value that you can set in the Shape Editor or Channel Box.
Specifies whether the blend shape is relative to the base object shape’s position, rotation, and scale, or is directly specified by you. Select from the following options.
Blends the base object shape to the target object shape(s), taking into account any differences in position, rotation, and scale between the target object shape(s).
The local and world selections are identical to the Origin creation option’s selections - see Blend Shape Options for more information. However, the User attribute is not one of the Origin creation option’s selections.
Blends the base object shape to the target object shape(s) while ignoring differences in position, rotation, and scale between the target shape(s).
Specifies that two special attributes, baseOrigin and targetOrigin, provide origin information. For more information on these attributes, see the online Node and Attribute Reference and the MEL Command reference. You can use the setAttr MEL command to set the values of the baseOrigin and targetOrigin attributes.
Specifies the influence value, or weight, of the named target. A value of 0.000 specifies that the target has no influence; a value of 1.000 specifies that the target has maximum influence. For each named target, use the slider to select values from 0.000 to 1.000.
These target Weight sliders correspond to those in the Shape Editor and the target shape channel values in the Channel Box.
When on, you can enter negative weight values for a blend shape deformer. When off, the minimum weight value is 0 and negative values are not supported. This option is off by default.
Specifies the deformation scale factor. Use slider to select values from 0.000 to 1.000. You can also enter values from -2.000 to 2.000. A value of 2.000 would double the overall deformation effect. A negative value inverts the effect. Default is 1.000.
The Envelope attribute corresponds to the Weight value for a blend shape deformer in the Shape Editor and the Envelope channel in the Channel Box.
No extra attributes by default.