I made a custom area with tiz for the area graphics. The area looks alright for original BGII:ToB and it did for BGII:EE v1.3.
Now, for v2.x, if I visit the area in the game the lines of the tilesets show like a grid. It looks horrible. I have no idea about area graphics and how the EE is handling them. What would be the reason for the loss in quality between versions and is there anything I can do about it?