How was the mom sweater made?
It was made using a script called Slide Knit, which uses UVs as a skinning reference for meshes. The simulated mesh was created in Marvelous Designer and then imported into 3DS Max. There, I modeled real wool patterns and used the UVs made in Marvelous Designer as the skinning source.
The wool then morphed over the simulated sweater and followed the existing Marvelous Designer simulation over the animation cache.
Some V-Ray Fur was then added to enhance the realism of the wool just before rendering.