Boolean modifier applies weirdly I am following IanHubert's post-apocalyptic buildings tutorial and I can't figure out why my boolean modifier takes so long to render, and why is it buggy.


As you can see, the mesh isn't edited, but the parts of the mesh overlapped by the boolean operand aren't displayed.
My building is made out of several stretched out cubes, joined togehter using CTRL+J. Blender freezes for about 30 seconds each time I swicth to edit or object mode or I try to move the operand or the object.
What did I do wrong?
In this case you can use the &quot;Fast&quot; mode in the modifier settings in order to limit the heavy calculations caused by the &quot;Exact&quot; solver mode.