@cotty said:

You need a static mesh (context menu).

Thanks a lot ! It's perfect !!!!

@cotty said:

Fist test VERY promising!

[screenr:zkq34ycx]yhhN[/screenr:zkq34ycx]

It's awesome. I'm testing, but my blocks fall into infinity (the boundary surface drops as well) . I do not know how to make a surface to retain them. How I can fix it? Could you stop the simulation and save the drawing? Thank you!