keeblerElf is correct with his description for the Infinate Matrix Edge option. When you scroll a matrix and the top/bottom left/right edges aren't the same height then as he says you get holes in the matrix.
This option averages the edge heights along the matrix 'seams' so that if the height at the top of the matrix at position 'x' was 200 and the height at the bottom of the matrix at the same 'x' position was 100, then the heights of both would be set to 150.
MatEdit Pro is progressing slowly mainly due to the way that the VanTrans texture routines have been integrated. All sorts of problems I hadn't envisaged started popping up. I think I've got it sussed now.
You can select any 2 textures and generate a transition set. You can regenerate with two different textures or hit the 'Keep' button to transfer the generated textures to the texture palette. You can generate up to 10 sets and flip between them with the mouse or the number keys.
When a generated set is displayed, all textures are shown in their correct positions as in the above screenshots - making the selection a hell of a lot easier than if you had to select them from the texture palette!
The sets are saved with the matrix and on re-loading the sets are automatically regenerated for the display.
I'm sure you'll appreciate that the repurcussions of doing this in DB code have been a nightmare!
TDK
MatEdit Pro Info & Progress Reports: http://www.matedit.com