I finally figured it out.
In full-screen mode, antialias with multiple passes is fast. When you are windowed mode, AND you are using multiple passes, AND antialiasing is on, it will be really slow, like 5 fps.
So all I have to do is turn off antialiasing in the editor. :P
In full-screen mode, antialias with multiple passes is fast. When you are windowed mode, AND you are using multiple passes, AND antialiasing is on, it will be really slow, like 5 fps.
So all I have to do is turn off antialiasing in the editor. :P