Hi Elaine,
Ok thank you. DAE do indeed seem to render the colours properly as I can see them in Mac Preview, though seemingly not in other tools as you say.
I don't suppose there is any way for chimera to write the colours out as an MTL file since this seems to be the approach other tools take.
I'm not very familiar with these file formats, but it seems to have something to do with colours being applied on vertices but not faces.
Any more info you have would be appreciated.
Thanks,
Joe