Hi , first , thanx to have taken the time to answer I appreciate, really. Next , I found the solution. I had a doubt seeing all the processes on my computer. And knowing my scene, that was not a poly number problem. I remembered a thread were it was talking about the maximum size of the texture. And that was the problem. I used 12000²px texture sized. Sketchup itself could'nt have threat such an info. I resized the texture , and it worked. So that was a texture size error. Working normally on big softawre like 3DS MAX , etc , I use to make big sized textures. So that was my fault. Thanx a lot anyway for the anwser. And really good job for your software. Some lights artefacts problems persist, but globally it's a good job