I have created my own G3 free bone character and exported to .psd in GIMP for mac. if I export the full body and try to import it back it always fails with the error 'face layer missing' even though the face layer is there. I do a partial export, separating the head and body, when I import again its says it is successful but it doesnt import the iris/eye white/mask and therefore doesnt give me a working eye. is this a normal problem when using gimp? what am I missing?