OpenMW-CS: Terrain mesh mismatch at cell borders
When creating terrain with OpenMW-CS, it leaves a gap between terrain meshes of neighboring cells.
No tool currently available in OpenMW-CS can be used to fix this issue. Smooth and flatten brushes affect both terrain patches but still leave the gap. If I remember correctly, the gap can occur upon subsequent loading of the .omwaddon or .omwgame file in OpenMW-CS. That is, when the terrain was initially shaped the gap wasn't there, but it showed the next time I opened the file in OpenMW-CS.