Thank you enkonyito.
At first.. great pictures on your sites.. [:x]
And about rendering properties..hmmm...My problem with GI-path is, that my settings are OK....but I still have black pictures only in this project. Still don't know why. Have the same settings in other projects and GI-path runs normal. [:(]
Problem is /maybe/ that I have very simple graphic cards in my comp [:))] .... intel CORE i3 and NVIDIA GEFORCE 930M.....
It looks it's a kind of magic that I am able to produce any renderings [:))]