r.SkinCache.RecomputeTangents

This option enables recomputing the vertex tangents on the GPUCan be changed at runtime, requires both r.SkinCache.CompileShaders=1, r.SkinCache.Mode=1 and r.SkinCache.Allow= 0: of 1: on, forces all skinned object to Recompute Tangent 2: on, only recompute tangents on skinned objects who ticked the Recompute Tangents checkbox(default