Write hair hair material data into GBuffer before post processing run. 0: no write, 1: dummy write into GBuffer A/B (Normal/ShadingModel), 2: write into GBuffer A/B (Normal/ShadingModel). 2: Write entire GBuffer data. (default 1).
Usage
r.HairStrands.WriteGBufferData [value]
Set via the console (~) or in DefaultEngine.ini / DefaultGame.ini.