I am trying your node but I am having some trouble understanding how to use it correctly. I am still quite new to AN.
As you can see in the screenshot I get a warning about the number of vertexes being invalid. I guess this is because he want’s to know how many vertexes there are in the mesh. I thought about creating a loop and using its index as index input for the vertex color node, but I get a critical error.
Looking at your tutorial in the post 3169 I see you use matrices, but I cannot find some of the nodes, like the “prepare transform polygons” and the “transform polygons” ones. Opening the file you provided they are unidentified nodes, so I guess they are either coming from an old AN version or another custom node.
Anyway… any help would be great!