Control a per decal stencil pass that allows to large (screen space) decals faster. It adds more overhead per decals so thi <0: optimization is disable 0: optimization is enabled no matter how small (screen space) the decal i0..1: optimization is enabled, value defines the minimum size (screen space) to trigger the optimization (default 0.1)
Usage
r.Decal.StencilSizeThreshold [value]
Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.
