Well that's not fully truth.
There's something in server_srv.so & server.dll makes client's avoid invisiblity of items
I"m not sure if it works on parenting models but it works on wearables & weapons
Someday i'il maybe release it when some people here stop overreacting, swearing & hating everyone who try to create something that could make Randomizer, Custom Hats, Be The Zombie etc. plugins better