For How to Train Your Dragon: The Hidden World, DreamWorks Animation made the decision to reuse the existing character assets from the preceding production, How to Train Your Dragon 2. Many resourceswere put into rigging the large quantity of characters , and the rigs went through intense scrutiny. This created an interesting suite of challenges for the rigging team, involving everything from adding secondary add-on deformation systems to legacy characters, creating characters that mixed and matched new faces with old bodies, and the development of a new ’simple dragon’ rig to help populate the world.

Research Paper for Rigging with Constraints on How to Train Your Dragon: The Hidden World