ent_mtlset isn't calling the Material's event

unsure if this is suppose to be correct as the manual says nothing about it being disabled?

Material events are tied directly to the entity.
Also materials assigned with ent_mtlset() cannot use skills.

For such materials, only entity materials can be used. (entity->material = ... instead of ent_mtlset()).

So you cannot have different material events for each skin of the entity.