Hallo to all, Hallo hansmex.

I created a roof with the 3D-Generator you recommended (great tool for landscaping)

Now I wanted to add a roof-window to it.

As the 'box invisible' and the 'box transparent glass' do not create holes in objects, I would need an effect that makes objects invisible. Next difficulty would then be, to not affect the window but only the roof.

The easiest way to get the same result would be a function that many grafical tools provide: Mask & Sizzors/Cut/Delete
(Create a mask in the size of the window and erase part of the object[roof])

Any Suggestions?