Motion Vector - Arnold for Houdini

This shader will encode a vector representing the motion of the object in the Red and Green components.

A sample scene that demonstrates the correct workflow (motion vector AOV) can be found here.

Camera Shutter Workflow

• Transformation and/or deformation blur must be enabled.

• Select the "motionvector" AOV for output (type RGB is fine).

• Toggle Instantaneous Shutter for Motion Vectors in the camera properties.

_{Instantaneous Shutter for Motion Vectors enabled}