I am new to SRB2 and Doom Editor. I was following a tutorial that said to load the SRB2 iwad stuff (which I don't understand any of that) and when I go to test my level, it doesn't refresh! It draws the words Greenflower zone all over the screen, and whenever I move, it draws my character on the screen as well, but doesn't refresh, so after a few seconds it has a million sonics all over the screen!!! What do I do? Note: I do know how to edit the vertexes and lines and such, I just don't understand the whole iwad bit...