I built a simple test map (koth) with lighting, spawnpoints, spawnrooms, everything and if I load the map from the TF2 client, my TF2 crashes to desktop without warning. If I run it from SRCDS, I get the message srcds.exe has stopped working. I look in the console of the server and there are no error messages. I put my compile log through Interlopers.net and here is the only error it gave me: can't load skybox file skybox/sky_dustbowl_01 to build the default cubemap! Description: You have entered a skybox texture which doesn't seem to be valid. Make sure you don't specify the last three letter (_UP, _DN, etc) of any skybox texture you use. You may also need to fix your vmt files if they are broken. It may also be caused by compiling a non-HDR skybox texture. Solution: WIKI: Skybox The affected object may not work/appear properly This is my first time making a map and I really appreciate anyone who helps me out! Thank you!