Vulper Skirt

Recommended that you know how to use Unity as this asset only comes with the fbx file. Simple uv-maping so you might not need any substance painters!

Add the Phys bones on the bone called hips and use the vrc armature link component to match the hips to the hips of the body.

It's blendshapes are made to fit the Vulper. feel free to open the fbx file and make your own. When exporting the fbx be sure to turn off bake animations and turn off add leaf bones, and then be sure to select fbx all.

Don't forget to toggle your fluff that's in the way

The settings I personally use to make the skirt work (There could be a better way so feel free to experiment with it)
I add rotation constraint components to all bones called Left # or Right #.
I set the weight of each to the following
Left 1 = 0.6
Left 2 = 0.6
Left 3 = 0.6
Left 4 = 0.1
Left 5 = 0.1
Right 1 = 0.6
Right 2 = 0.6
Right 3 = 0.6
Right 4 = 0.1
Right 5 = 0.1
And then hit active on each of them

I set the physbones in the hips and change the limits option to angle and the max angle to 10
These settings may not be perfect!