Try hiding all texture sets in painting mode before starting the bake.
That might free up enough VRAM to finish the process.
You can also try baking one map at a time, to avoid having the other maps in VRAM during the bake.

Ursprungligen skrivet av Mio Rin:

Try hiding all texture sets in painting mode before starting the bake.
That might free up enough VRAM to finish the process.
You can also try baking one map at a time, to avoid having the other maps in VRAM during the bake.

I tried the latter before and usually always do that especially when I bake really large maps or bake from model with a really high polycount but didn't work in this case.

Disabling iray helped a little bit, but it only worked when I tried to bake a model with half the polycount (luckily we use one-sided UV's in this case so we just sliced it in half).
Trying to bake the full high poly model constantly crashes Substance Painter.
I've also noticed in previous versions that models with a really high polycount also would cause SP not to bake maps properly. They would look completely deformed on the low poly model.
Substance Painter seems to have a problem when it comes to baking maps from models with a polycount higher than 50 million.

The problem is the amount of VRAM on your GPU.
You simply don't have enough to be able to bake from a 50M poly mesh.