Is there a way to export to obj, and also to export colour?

phtj
Is there a way to export to obj, and also to export colour?

Nope, afaik .obj does not support color. About the only thing that can be point varying are texture vertices and normals. The whole notion that you could have arbitrary per-point or per-vertex data is not something that the designers envisioned.

http://www.martinreddy.net/gfx/3d/OBJ.spec [martinreddy.net]

thanls - I thought that might be the case

if you need colour, what is the best format?

Just did a few test - for polygons, .ply seems to work ok
Of course, any nurbs will be lost

see attached