I've been using 3D Coat for a little while now and this has always been an issue. Currently I'm using a file which is 300mb, model has around 5k polys, and i'm painting on one 4k UV set. The file starts off working just fine but as I start to add more and more layers it begins getting incredibly slow to open / send to photoshop, and most of the time crashes due to lack of memory / shuts my pc down all together. I find this a little odd as I have 32gb of RAM. Perhaps though I am missing something here. Does anyone have any ideas of possible solutions?
My guess is that it is something to do with the 4k texture size / the amount of layers i'm using (around 70, only colour no spec or bump), but it's difficult to compromise on these things.
Unfortunately I am not able to share the .3b file.
I'm using 4.8.09(DX64).
If any other info is needed, I'd be happy to share