How to create a "Colour" room?

like the one in GM_construct.

how do i create a color room.

Tie the individual brushes to func_brush or similar entity.

Manually add the keyvalue “gmod_allowphysgun” “0” to prevent physgun interaction.

Did I miss something?

I think all you have to do is place a bunch of multi-colored light_spot entities.

He’s talking about the white room where you can change the colors of the walls

Oh, yes. That one. I have no idea.

Here you go: