I've encountered a problem where my map seems to be not working when I open it in radiant. Radiant will open everything else fine but it seems that my map is causing errors in the program. I have tried replacing the files of core folder (I have a clean backup of it) and making a map using script placer with the map as the custom map.

When I load up the map the 2d view shows what is in it but won't move and the camera is blank. I can however place objects like models in the 2d view but can not interact with them at all. If I save the map and come back the model can be seen to have loaded in. The scrolling of the textures does not work as well.

If anyone has any ideas how I can reclaim the map or if someone wants me to send them the files of the map and have a try themselves I would be very appreciative.

update your gpu driver. that's how i fixed mine.