I am having a house plan with build up walls. I want to create a animation in which the walls disappear from top to bottom. While still cleaning up the geometry I tried already to cut the geometry in boolean with a big cube down. It works well in the first 10% of the geometry, then the object disappears. After shifting the cube more down the cut object reappears again and everything looks as it should be. Any idea, what could cause the problem and how to solve. As mentioned, I am still cleaning the model up.
Thanks in advance for your input