 GPU_DYNAMIC_MAT_REF = 458754
 GPU_DYNAMIC_MAT_SPEC = 458756
 GPU_DYNAMIC_MAT_SPECRGB = 458755
+GPU_DYNAMIC_MAT_MIR = 9 | GPU_DYNAMIC_GROUP_MAT
 GPU_DYNAMIC_MIST_COLOR = 327686
 GPU_DYNAMIC_MIST_DISTANCE = 327683
 GPU_DYNAMIC_MIST_ENABLE = 327681

GPU_DYNAMIC_LAMP_SPOTBLEND = 131083     #                 missing?
GPU_DYNAMIC_LAMP_SPOTSCALE = 131084     #                    X
GPU_DYNAMIC_LAMP_SPOTSIZE = 131082      #                    X
GPU_DYNAMIC_MAT_ALPHA = 458760
GPU_DYNAMIC_MAT_AMB = 458759
GPU_DYNAMIC_MAT_DIFFRGB = 458753

                    @shading_params_dict[u.material].vars.emit = u.varname
                when GPU_DYNAMIC_MAT_ALPHA
                    @shading_params_dict[u.material].vars.alpha = u.varname
                when GPU_DYNAMIC_MAT_MIR, \
                        GPU_DYNAMIC_LAMP_COEFFCONST, \
                        GPU_DYNAMIC_LAMP_COEFFLIN, \
                        GPU_DYNAMIC_LAMP_COEFFQUAD
                    # TODO: Use values
                    var_custom.push u.varname
                when GPU_DYNAMIC_MIST_COLOR
                    var_mistcol = u.varname
                when GPU_DYNAMIC_MIST_DISTANCE
