Whether to apply optimized render path when capturing depth prepass for scene capture 2D. Experimental!
Warning: turning it on means rendering after depth pre-pass (e.g. SingleLayerWater) is ignored, hence result is different from when CVar is off.
Usage
r.SceneCapture.DepthPrepassOptimization [value]
Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.
