I cannot see the layer of room structure in the 'Project' panel. The list consists of everything I have done manually, but not the structure I have set at the beginning. Is there any option to bring it back?
PS I can mark everything on the 3D view, except for this room structure- roof, walls and floor- same time- I cannot set the reflections and colors of their surfaces.
Also, while calculating, I got an errors of collisions, while there are non. What can be the reason?