Random Background Character Generation

This page is all about information pertaining to random background character generation in the DreamWorks Trolls franchise.
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Traditional hand-drawn animation only allowed a limited number of animated assets due to production time and cost. Often cheats were applied to show audiences such as using only black or dark blue colors and having only a few frames of looping animation movement.
This changed when newer digital animation tools became available to animators. Random design generation has been a popular tool used by animation studios, with the advent of the digital animation age. It was now possible to generate randomly created characters using tools that would change out hair, clothing and colors to create unique designs. The random generation tools allowed animators to make large crowds of people. The advantage of this is that these large crowds could be used to make worlds feel full and alive. The models of these randomly generated Trolls aren't always as detailed as the named characters of the franchise, and some are lower quality. Nonetheless, they can move on their own, even if they just end up using looping animation; unlike traditional animation, they often have the same amount of frames as anything else onscreen.
DreamWorks Animation often takes advantage of these tools to fill out scenes for its movies, such as the flocks of dragons in How to Train Your Dragon or the crowds of cheering people in Megamind. Scenes will use between 2-30 pre-generated models (depending on what species is used) for any one scene. They're formulaic, and it's visionally easy to tell the type of creature they are, their gender and their age without difficulty just by a first glance alone. Once created, both 2D and 3D Trolls are then reused and repeated by simply changing their colored assets, with the same model being repeated in an illusion to make it appear as though there are many Trolls on any given scene and that these Trolls are each individually different. While in some circumstances Trolls of the same color do appear on screen, it's rare despite how limited the designs of these background Trolls can be.
The technique is also on various Fauna and sometimes Flora. Where one model is used to represent an entire species, but modified.
=== Examples ===
3Dmodelstwt.jpg|By simply changing parts of a previously-made model, an entirely new Troll can be created. Here is an example done with a Funk Troll. 3D models by Kaleb Rice.
twtfunkvariation.jpg|Once the model is completed, it can be used to fill out a scene. Here's another example of the Funk Trolls in use. Note that for many Trolls, the colors of the models used are changed and repeated. 3D models by Kaleb Rice.
4141572.jpg|In reality, ignoring Queen Essence and King Quincy, there is about a dozen or so models repeated to make over 50 or so Funk Trolls.
Mount Rageons1.png|Various Mount Rageons. One of which is not a random background generated character; Kid Ritz. Note how much more detailed he is compared to the other Rageons around him.
BRGNAS1.PNG.png|A crowd of Bergens made possible by swapping assets. You can easily spot how asset swapping was used to create dozens of Bergens. 
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*Random Trolls
*Random Bergens
*Random Mount Rageons
*Random Vacaytioners