I need to set an object not to self occlude. According to the docs, this can be done with the "Id_nonself" feature, but I cannot figure out how to use it. id_nonself works similar to id_inclexcl in that it is an object instance label determining which objects do not self- occlude. Set to 0 it has no effect. Set to a positive integer will prevent any object with that label from occluding other objects with the same label. Originally Posted by What label? Does anyone know how to use this function? Thanks. -dann