<function name="IsError" parent="IMaterial" type="classfunc"> <description>Returns whenever the material is valid, i.e. whether it was not loaded successfully from disk or not.</description> <realm>Shared</realm>⤶ <realm>Shared and Menu</realm>⤶ <rets> <ret name="" type="boolean">Is this material the error material? (___error)</ret> </rets> </function>