so, I was making my ♥♥♥♥♥♥ map on hammer.exe and I had done the skybox and ran the map. Everything was nice and looked pretty. Then, I went inside one of my buildings and noted how boring it looks. I added lights. When I loaded the map again, the whole map was dark exept the skybox and the light. everything else black. here are some screenshots: http://imgur.com/a/2GwyY