So today i made a world.
For the change i went in worldpainter and after 5 hours i made a amazing island which allows for great buildings and all.
But i am shocking now as it seems that every gt ore became broken. Its a normal stone texture. With Oreitem or something like that.
Is there any way i can fix this?
GregTech Ores are one kind of block with NBT Tags and data. Likely WorldPainter ignored these and erased it on save. There is no post-ore-regeneration available for GregTech, so you basically lost these Ore. If you like to keep your nice painted island:
Replace GregTech Ores and granites with stone within the chunks containing your island.
Delete all chunks outside your island so they will properly re-generate.