This is probably one for @Jerome but others will have more idea than I do anyway.   Have been playing with the Rhombicuboctahedron and trying to place the same image on each face. (Starting with one image rather than an image atlas as thought it would be easier).   Pinching bits and pieces from here and there from BABYLON.js max I created this playground.   As you can see I got in a bit of a mess - something to do with having the uvs in the wrong order probably.   Any help gratefully received.