After a uncountable tries of rendering with LS and more or less unsatisfied results I tried Insight for the first time and here is the first result of it.
The scene has nearly 70000 faces, the processing took under five minutes and the raytracing was done in almost two minutes!
I used an AMD Athlon with 1,4 GHz and was quite surprised about the short period of calculation.
I know it's surely not perfect, but Rom wasn't built at one day too...;o)
Thanks already for a couple of constructive advices
