yeah sure,... but,... those textures have 4000x4000 pixel or so. The biggest pictures I do are maybe 1900 x 1100 and the figure in the scene is making maybe 50% of that pictures size,...and that texture is only for a dress, that again is maybe 50% of that figures size...
might be a complete wrong calculation, but I'd guess, that a 1500x1500 px texture would make the same job as the large one.

but anyway....that has nothing to do with the original question here...guess I have to live with reworking the textures... :)