In Clarisse, there are many different kinds of geometries. A Geometry is a 3d object made of points and primitives. Primitives are necessarily boundable 2d parametric surfaces. For example, for a set of parametric UV, a primitive must be able to return a coherent position in local space. Primitives are necessary mapped to a shading group used to attach materials.
Geometries support also normal map and both multiple vertex color maps and UV maps. Vertex color maps can be accessed using a TextureVertexColorMap in your material shaders. Please refer to Vertex Color Maps section.