Thanks, but I don't use display.wdl. (Could not find 'dynamic sun = true' in that file anyway)
EDIT:
Here is the terrain with the *.tga files scaled down to 0.1 and without the action fx_terraintex3(), and it still looks verry blurry;

And this is how it looks when I attach the action fx_terraintex3() from the mtlFX.wdl file.

Is there realy nobobby who has tried this new gadget (Terrain Texture Creator) and can tell me how to use this? Please help me.