The good news is that jiggle physics actually works on this mod, which means that I can implement them in future mods too. On the other hand, the colors are problematic just because I used the "wrong" furniture prop. As you can see from the preview screenshots, some body parts are glowing while others are too dark.
If I can't find any better solution, I might switch to another furniture prop. I wanted to use this sofa furniture prop because it's one of the most basic piece of furniture available in the game. This means that most likely you'll have access to this furniture no matter how far you're in the archon quests. But alas, this sofa furniture has its own issues.