Hi guys,
I was using povray - I think I'll have to go with editing the pov file to use the infinite sky sphere object. I was using a flipped sphere object already. Making it bigger doesn't seem to resolve the problem, since the shadow depth extends quite a long way (although I didn't try making it gargantuan, I'm not sure of the scene:sphere size ratio that I should use). A bit of a shame since it means I won't be able to preview the scene directly in AC3D
