thanks for your replies, sorry for the delay in answering, i had to finish the projekt first… → FM3D | science communication // virtual showroom
i seems, that @sebavan was right: The 8k-texture was from some animation created in blender, the “gthost-textures” seem to be somehow related with the skeletons. After adding some more NPCs i now have 18 of this textures in my project…
Are those needed by BJS? Can i get rid of them? 
Or are they irrelevant (performance/memory-wise)?