XGen Hair and custom shaders

Great tutorial for creating XGen Hair with custom shaders and use of Disney’s expression language …

Inside mental ray

Today we want to talk about how to use a custom hair shader to render XGen hair in mental ray for Maya. We will see how such a shader can be assigned, how various helper nodes can be used to alter the appearance of the hair and finally, we will make use of Disney’s expression language SeExpr() to create some interesting effects. For this purpose we use this little doll with a simple XGen hair cut:

XGen Hair Scene

By default, XGen uses the xgen_hair_phen shader. This shader mimics the appearance of hair by using a classical Phong model with 2 specular lobes. The shader’s diffuse color parameter can be fed by the custom XGen shader parameters root_color and tip_color. Those need to be defined in the “XGen Window” and allow us to make use of SeExpr(). We won’t go into details on xgen_hair_phen here but simply link to a good…

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~ by Cylibral on November 12, 2014.

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