st.sub.append(self.create_property_statement(mat_res, material.roughness, "roughness", resources))
st.sub.append(self.create_property_statement(mat_res, material.normal, "normal", resources, tex_only=True))
st.sub.append(self.create_property_statement(mat_res, material.emission, "emission", resources))
st.sub.append(self.create_property_statement(mat_res, material.roughness, "roughness", resources))
st.sub.append(self.create_property_statement(mat_res, material.normal, "normal", resources, tex_only=True))
st.sub.append(self.create_property_statement(mat_res, material.emission, "emission", resources))