Twilight Render User Forum

Hi, I noticed a render problem with my modell that I dont understand. This is a printscreen from Sketchup: https://i.imgur.com/PAXuKTN.png In Wireframe mode: https://i.imgur.com/M83XS9zb.png And this is the output after rendering: https://i.imgur.com/dVhIEGY.jpg Does anybody have a clue what can be ...