copyUV operation
copyUV(uvSetSource, uvSetDest)
uvSetSource float Number of source texture coordinates set (integer number in [0,9]). The numbering corresponds to the texture layers of the material attribute, see also Texturing: Essential Knowledge.
uvSetDest float Number of destination texture coordinates set (integer number in [0,9]).
The copyUV operation copies texture coordinates of the given uvSetSource to uvSetDest.