Thanks for your reply isaac.
Another question: If I import a model from the asset pack... for instance the grave model. And then use a modifier (decimate, or any other) .. I cannot export the model again and get an error message (and the model files turns to 0 kb)
what am I missing here? I do have a rootnode and a gamematrix already set up?
Can someone point me in the right direction as to what can cause this?
Has it to do with the texture or uv mapping ... ?