Waits for the GPU to be idle after submitting a command buffer. Useful for tracking GPU hangs.
0: Do not wait(default)
1: Wait on every submit
2: Wait when submitting an upload buffer
3: Wait when submitting an active buffer (one that has gfx commands)
Usage
r.Vulkan.WaitForIdleOnSubmit [value]
Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.
