that´s the only way I could imagine. if you find an easier solution, I´m up for anything that works. and in case of correctional work (which will come for sure!) I don´t want to make tons of manual changes. keep in mind that I have at least (because the project is growing since it started):

150 objects on 150 layers
260 textures on timeline

for each variation 3 camera perspectives (3 single scenes)

equals 1.170.000 stills for now.

a must is to have 1 folder for every texture containing all geometries, with the objects named after the layer they´re applied to.