Hello, I was working on an apartment scene for a video game last night, when I saved and pressed P to start it and see how it was going. When I pressed it everything went gray except for one plane. The collision of all the other meshes are the because I can use the sole plane as a 3D cursor to see where I am and I stop where the walls would be.
I just tried too upload the blend file and it didn’t work soooooo 