greebles are all the doo-dads and watchamacallits on the outside of a thingamajig... usually a space thingamajig, but sometimes architectural doohickeys are greebled too... and don't confuse your thingamajig with a thingamabob... that'll get you into some trouble... :o) I haven't heard of one for Carrara... saw one for 3DS Max... would be useful if you do a lot of sci-fi scenes...