I hope someone can help with this query.
In Rhino, I can subselect the faces of a brep and assign them different materials, see the screenshot, this is a closed polysrf.
In Grasshopper I can deconstruct the brep and custom preview the faces in different colours. Or I can assign the faces different colours with elefront and bake them into Rhino as seperate surfaces. BUt then if i re-join them in Rhino they of course all become the same material again.
What I would be really interested to know is, does anyone have a method for assigning colours to the brep faces in grasshopper and baking that into Rhino so that it is closed but has the different colours/materials on the different faces?