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Maxwell supports Shave&Haircut by Joe Alter. The colors computed by Shave from the root/tip color, hue/value variation and mutant hair parameters can be exported and used as vertex colors; these parameters can also be textured. A Maxwell Render group is added on the Shave hair shape node, containing render flags, a material control and the vertex color toggle, just like for PaintFX hair.
Vertex Colors
The Maxwell hair primitive allows a color to be specified at each hair point (knot). These colors are interpolated along each segment and modulated (multiplied) by the reflectance 0 texture of the material. Therefore, when the hair system can generate color information, as is the case for Maya hair and Shave, you can use these computed colors inside Maxwell by applying a white texture on the reflectance 0 attribute of the material. The look of the hair in the following image was obtained by manipulating the Shave settings and applying a simple Maxwell material with only a white, 1-pixel texture:
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