Hm, when I set the mips flag of .SkinSize to true and pass pixels like I am doing for the main texture (the mip textures are each 1/2 the size of the previous texture...), I can't load the terrain in MED and when I load it as entity in the engine, it is unbelievable stretched on the z-axis...?

[EDIT]

Tested it twice: once with generated textures and once with provided textures... no success, though