[...]there is no real problem, as you can just take the data from the "old" model/terrain.
To me it _is_ a problem.
I look at this the other way round:
I can change the format of a texture and save it with pixel_to_vec and pixel_for_vec without problems.
That's probably a slow function, because it re-paints each pixel again, but for saving a model - who cares?
