Comment 3 for bug 1408707

> Am i right, that the only reason for dither_layer is: Give the dither-algorithm a rule, which terrain covers the other.

You are right.

Another solution could be to save the "z-layer" of a triangle into the map - the editor could always set the triangle to being "on-top" of the one around it when it is changed. Then every dithering should be representable through the order at which the triangles are set in the editor.

This would be a rather esoteric feature and only experienced map makers would fully understand it I think. And it is quite some work to implement.