Using this tutorial: Basic Gl in C4D I have created the ground floor using spline object. This I combined in a Sweep NURBS parent together with a rectangle, which gave me the 3D image of the ground floor. However, I am now trying to make windows and doors using a Boole and Polygon. I must be doing something wrong, because it crashes the program. It just becomes non-responsive until remove the objects from the Boole.

Thank you very much in advance.

Update: this turned out to be a flaw in R10 that is fixed in R10.5