Hello Wjbender, thanks for your answer. The Entities are not animated. I need it for a kind of wallcreation. I could also use many of entities, but this would damage the framerate, because the peaces are very small and there would be many entities needed. That's why I want to Merge meshes. In this point I would be grateful for some codeexamples, because I never programmed in meshmanipulation like this.