went overzealous on the bitangent cleanup when reviewing parallax. the W multiplier can and should stay. the y flip can remain gone.

Engine/source/shaderGen/GLSL/shaderFeatureGLSL.cpp

@@ -67,6 +67,8 @@ LangElement * ShaderFeatureGLSL::setupTexSpaceMat( Vector<ShaderComponent*> &, /
    {
       if(dStricmp((char*)T->type, "vec4") == 0)
          meta->addStatement( new GenOp( "   tSetMatrixRow(@, 1, cross( @, normalize(@) ) * @.w);\r\n", *texSpaceMat, T, N, T ) );
+      else if(tangentW)
+         meta->addStatement( new GenOp( "   tSetMatrixRow(@, 1, cross( @, normalize(@) ) * @);\r\n", *texSpaceMat, T, N, tangentW ) );
       else
          meta->addStatement( new GenOp( "   tSetMatrixRow(@, 1, cross( @, normalize(@) ));\r\n", *texSpaceMat, T, N ) );
    }

Engine/source/shaderGen/HLSL/shaderFeatureHLSL.cpp

@@ -67,6 +67,8 @@ LangElement * ShaderFeatureHLSL::setupTexSpaceMat( Vector<ShaderComponent*> &, /
    {
       if(dStricmp((char*)T->type, "float4") == 0)
          meta->addStatement( new GenOp( "   @[1] = cross( @, normalize(@) ) * @.w;\r\n", *texSpaceMat, T, N, T ) );
+      else if (tangentW)
+         meta->addStatement(new GenOp("   @[1] = cross( @, normalize(@) ) * @;\r\n", *texSpaceMat, T, N, tangentW));
       else
          meta->addStatement( new GenOp( "   @[1] = cross( @, normalize(@) );\r\n", *texSpaceMat, T, N ) );
    }