If a player tries to use two different objects that have the same ID, only one of them will show up in the catalog. So if you are making objects that you intend other people to use, you need to get your own Magic Cookie number, in order to that all the objects you create have unique identifiers.
There are only 65535 magic cookies available, and each one allows you to create fewer than 65536 unique objects. So please take one, have fun, but don't be greedy, and never abuse too much of a good thing!
Magic cookies are free for the asking, while they last. You can get one at the Magic Cookie Registry. One magic cookie is more than enough for most people: Cookie hoarders will be banned and their magic cookies recycled.
Type your magic cookie into the "Magic Cookie" field of the Clone Object File dialog, and Transmogrifier will remembered it in the registry for later.
When you clone an object, Transmogrifier randomly generates an 32 bit object ID based on your 16 bit magic cookie and a 16 bit random number. It then checks to make sure this random object id is unique across the objects that it can find in the Sims data directories. If not, it just generates another random object id, until it finds one that is unique across the objects it knows. If you're making lots of objects, keep them somewhere Transmogrifier can find them, so it doesn't reuse their object ids.
The author apologizes for this retrofitted approach to ensuring unique object ids, which was not part of the original design of The Sims. Therefore, the unique identifiers of all objects published by Maxis should be consider reserved, no matter what their magic cookie field.
Transmogrifier won't reuse the id of an object it can find in The Sims runtime directories, so as long as you use your own unique Magic Cookie, have the full complement of official objects from Maxis, and keep around all the new objects you've created, you should not have any problems.
An object can be composed of one or more component sprites, that can be animated independently, like the hands and bird of the Cuckoo Clock. Animations are accomplished by flipping between several different Sprite Images.
The original 3 dimensional object sprites are rendered in 3D Studio Max, using the other authoring tools. Transmogrifier is not a 3D graphics tool, however it does allow you to export, edit and import the two dimensional bitmaps that were originally rendered from 3D models, and even create your own sprite images by drawing them in 2 dimensions, without using a 3d graphics tool.People are drawn with live 3D polygons and texture maps instead of pre-rendered sprites, so you can't use Transmogrifier to edit their appearance.