Hi luuckyy and Andy
I tried that but the result is not very impressive.
I can use the knife-function only when the knife-object is a 3D-model, as a 2D-polyon it doesn't cut anything.
So here are the steps i made with the 3D-polygon, but as you can see, the knife does not cut all parts:
Do i something wrong or is there another way?
Thanks and regards
Robert