Wait for completion of parallel render thread tasks at the end of the base pass. A more granular version of r.RHICmdFlushRenderThreadTasks. If either r.RHICmdFlushRenderThreadTasks or r.RHICmdFlushRenderThreadTasksBasePass is > 0 we will flush.
Usage
r.RHICmdFlushRenderThreadTasksBasePass [value]
Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.