r.Shaders.FlowControlMode

Specifies whether the shader compiler should preserve or unroll flow-control in shader codeThis is primarily a debugging aid and will override any per-shader or per-material settings if not left at the default value (0) 0: Off (Default) - Entirely at the discretion of the platform compiler or the specific shader/material 1: Prefer - Attempt to preserve flow-control 2: Avoid - Attempt to unroll and flatten flow-control