After learning a bit more about Mixer i went back to the crate to see what i could to to improve it.
Firstly there where a lot of noise in the color ID map that i rendered in Maya. And that created some small problems when making the textures for the crate. Mostly around the metal area. I dont know why it added such noise, but a quick fix in photoshop fixed the issues and i could now render the metal a bit better.
I also added more grime to the crate to make it seam a bit more worn. it’s slightly better then the older version but not by much. I am pretty certain I can make it even better in a few weeks.
The best option would probably be to remake the whole box properly and be more happy with the overall result afterwards. And by then I could also add proper LoDs to the thing without making it break too much.