Hey, so i recently started playing Paper Mario: The Thousand Year Door, and i noticed that when paper would move in certain ways, my fps would drop massively. I read somewhere that switching to Direct3D solves the problem, but when i go to switch to Direct3D, its greyed out, with text saying OpenGL. Why won't it let me switch off OpenGL?
Also your profile says you're using 4.0. You should definitely upgrade to 5.0 or the preferably the latest development builds.
EDIT: I also just got version 5.0, issue is still present.
You can only switch back-ends when the game is not running.