W Coordinate texture - gradient along the length of curve - Blender Octane
The W Coordinate texture is a way to access the OctaneRender® W Coordinate system, which provides the means to place gradients on hair geometry. It stores an inherent hair gradient interpolation along with hair data exported from common 3D modelling applications. It takes into account the basis of the interpolation set in an Octane Obj Params tab attached to a scene object. When you plug the W Coordinate into a Gradient texture as the Input texture, it tells OctaneRender to render the inputs as a gradient mapping based on either the hair length or the segment count per strand.
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