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Assets/ScriptableRenderLoop/HDRenderLoop/Material/Lit/Lit.hlsl

 
     // Construct an orthonormal basis (local coordinate system) around N.
     // TODO: it could be stored in PreLightData. All LTC lights compute it more than once!
+    // Also consider using 'bsdfData.tangentWS', 'bsdfData.bitangentWS', 'bsdfData.normalWS'.
     float3x3 basis;
     basis[0] = normalize(V - bsdfData.normalWS * preLightData.NdotV);
     basis[1] = normalize(cross(bsdfData.normalWS, basis[0]));

Assets/ScriptableRenderLoop/ShaderLibrary/AreaLighting.hlsl

 {
     // Construct local orthonormal basis around N, aligned with N
     // TODO: it could be stored in PreLightData. All LTC lights compute it more than once!
+    // Also consider using 'bsdfData.tangentWS', 'bsdfData.bitangentWS', 'bsdfData.normalWS'.
     float3x3 basis;
     basis[0] = normalize(V - N * NdotV);
     basis[1] = normalize(cross(N, basis[0]));