Enable to force singlethreaded creation of PSOs. Only intended as a workaround for buggy drivers
0: (default) Allow Async precompile PSO creation.
1: force singlethreaded creation of all PSOs.
2: force singlethreaded creation of precompile PSOs only.
3: force singlethreaded creation of non-precompile PSOs only.
Usage
r.Vulkan.ForcePSOSingleThreaded [value]
Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.