I wanted to start TF2 mapping again, but when I launched Hammer editor to start working on a new map, something weird happened. When I pressed W or S to move the brushes would flicker and move back and forth. Also the camera was hard to control and was somehow bit tilted. Also all of the 2D and 3D views had a yellow number count. (frames per second counter I imagine). Also the white boxes in the 3D view that you can use to edit a brush in 3D view were about two times bigger than normal. The Source Filmmaker hammer editor worked fine few days ago, so no idea what caused this. Restarting did not fix this problem in anyway. If you know how to fix this, then big thank you for you!