Curves and Splines [update]

CentiLeo supports rendering native Cinema 4D Hair object, Ornatrix hair object, Spline objects, Line objects, Mograph tracers, MoSplines and xpTrail objects.

For spline object, tracers, trails it's needed to add CentiLeo Object Tag to enable curve / spline rendering.

Using this tag Curve/Spline options it's possible to control the appearance of curved line and make it smooth or build a number of straight lines. 

It's possible to setup thickness from root to tip and override existing thickness for hair object.

Thickness curve can be used to make complex thickness shape from the root to the tip of the curves or splines.

Resampling option allow to generate fixed amount of spline vertices. Sometimes it can be useful for curve rendering precision improvement. It can be useful to interpolate the spline based on Cinema 4D spline settings. In the other cases making constant vertex count per spline or curved line can help to setup deformation motion blur.

Curve / Spline or Hair objects produce some attributes such as W coordinate, Root UVW and Vertex Color (for xpTrail). These attributes are available in Hair Info texture node.

The W coordinate draws a greyscale mapping from the root to the tip of the curve. The Root UVW containes the UVW values for origin surface where the hair is growing. Native Cinema Hair object provides one RootUVW channel, but Ornatrix provides multiple channels which can be accessed using RootUVW0, RootUVW1, RootUVW2... references.