Hi ,
Thank you that is very kind.
We are not doing the same. I’m building an interactive simulation based on OO. So I hope to have 10.000 or more objects interacting autonomous and see effects. The model and data related stuff is coming along fine. Just this whole “UV mapping thing” is very new to me. From reading the forums I know SketchUp is not taken very serious here 
…but I can’t help loving it’s ease of use.
I assume you use a solid-modeller ?
Can you share some tips regarding your modelling to U4 workflow
Thanks again.