Apologies for the delay in getting back. Work....

Toxe, your are correct about the Improved Edges only being available with Indirect Lighting. Using pure G.I. doesn't allow for it. However, as the image above shows, using Indirect Lighting with Improved Edges creates a nice image that is artifact free - at least in this example.

Interpolation: Ahhh, always the mystery. Interpolation accuracy (educated guessing) simply tells Carrara how "correct" you want its light calculation to be. At the default 20%, Carrara is only accurate on 20% of its calculations - the rest uses a close-is-good-enough approximation. Turning Interpolation up to 100% or turning it completely off means Carrara does all the math and calculations for the the light rays. Of course doing all that math takes longer.

On scenes with no transparent objects, the interpolation difference is not that great. On scenes with glass objects, these settings are the difference in completing the image in your lifetime or not!

Message edited on: 12/11/2004 16:13