I traced the Export routines all the way back to the Direct3D drawing primatives. It uses a 2D textured triangle fan (i.e. a quad) to draw the exported MFD. The quad can be any shape with four sides, it matches the texture to the quad, but in stretching and scrunching the texture it messes up the texture. The code is buried in a D3D dll, so it isn't alterable. I may be able to correct part of the problem by using thicker lines (I found a thick line command). An anti-aliased line would work, but I couldn't find one. Blurring the texture would also work, but I couldn't find a blurring filter either.