_.layout.prop( active_mat.SR_data, "shader" )
_.layout.prop( active_mat.SR_data, "surface_prop" )
_.layout.prop( active_mat.SR_data, "collision" )
_.layout.prop( active_mat.SR_data, "shader" )
_.layout.prop( active_mat.SR_data, "surface_prop" )
_.layout.prop( active_mat.SR_data, "collision" )