Hello Thanks a lot for the comments. I am trying to render some biological pictures with this fancy effect. However, I don't know where can I find some tutorial to do this. If possible, could you please give me some advice? For instance, how can we make such kind of texture which looks like a cloth? Is there also any advance tutorial showing how to render object with different lighting effect? Thanks a lot Albert -C -C On 29 Jul 2017 11:09 a.m., "Albert" <mailmd2011@...125...> wrote: