Thanks for your answer. The problem is, that the square with the white also contains colour from the image. If I delete one of the squares I loose the colour as well.

Hi there, I have a question regarding importing of pdfs. I have a CAD-programme in which I created a caloured and shaded 3D-model. I exported it as a pdf and I imported it to Inkscape. When I created a layer behind the imported I saw that the whole model is surrounded by white boxes. The CAD-package...