In fact there are two ways you can get some interactivity while painting maps:
1. Using VRayVertexColors texture
Steps:
- assign the texture to one of the maps for the fur
- create a vertex color set for you mesh
- select the colorset in the texture
- use the Maya's tools for painting the colors ( Polygons->Colors->Paint Vertex Color tool)
This method will work if you have a dense mesh.
2. Using the 3d Paint capabilities of Maya (this method is a bit hacky)
Steps:
- assign a lambert material, as VRayMtl doesn't work
- select the rendering->texturing->3d paint tool
- open the tool settings
- attribute to paint = color
- click assign/edit texture
- enable update on stroke
- enable save texture on stroke
- open hypershade and assign the new file texture to one of the maps of VRayFur (the texture should be assigned to the material and to the fur at the same time in order to paint it)
- paint
/Teodor
