I just noticed that the PHYS asset that was created when I imported my model only had physics applied for the skirt and the hair. So I created a new, full body PHYS asset. This is what my Details panel looks like, with a selected joint. I’m still not seeing these options.
After looking some more, I finally found it. I was looking at the bottom of the screen where it has Constraint Creation. I had to scroll DOWN in the Details panel to find the section Angular Limits. Thank you!
