mat_fullbright wont turn off.

Well, when I loaded a map, everything was fine, but I stepped a few steps back by accident and it loaded the previous one. This would be fine, but when I entered that map, mat_fullbright apparently turned itself on, and I cant turn it off through console or anything on these maps. I think it worked on flatgrass and gm_construct, but not the campaign maps. Any help?

Thanks.

Hey. Have you tried restarting Gmod? Try this and tell me if it fixes your problem. I know it’s simple but maybe it worth a try.

I restarted it, but no change. It says mat_fullbright is on, but it wont let me change it to 0.