Radiant always crashes on me when I try to insert new models for some reason reason. It'll say "Radiant has encountered an error." For some reason, anyone know why?
Edit: And I mean a model like a bench, a chair, something along the lines of that.
I had troubles with radiant and errors too. I had an SIS 315 graphics card at the time and radiant crashed on me every time I started it up. I had to change colors (i dont remember if I had to change it to 16 or 32 bit). Try to change the colors and see if it'll work.