Is there a way to just have the outline but no colors filled in in the main body?
(EDIT: Oh wow I just realized I've already talked to you in DMs before, even using this screenshot lol)
If I understand the question correctly, no, not with this plugin. I'm no technical expert but I've been using this plugin for a couple years now and it always forces flat shading on the characters, wreaking havoc with a lot of other resources/plugins. It's still the only thing truly capable of generating the "toon/anime" flat-shaded look, afaik, but you have to work within the limitations to generate nice looks/scenes.
...that said, some time ago I did figure out a "pseudo"-outline method using existing geoshell clothing resources and manipulating shader queues, which doesn't use this plugin at all:
Basically, it uses
this "clothing" resource with altered shader queues on both it and background CUA assets (use
DLUtils to adjust shader queues on these), as well as increases to the clothing alpha/thickness/surface offset values, to mimic an outline effect around the body. Naturally this won't extend to any CUAs but it doesn't extend to clothing items either, nor when overlaid against the body, unlike the plugin.
Here's a shot on Elizabeth, which showcases it on a more traditional "human" textured (but still toon-ish) model. Sorry about the hair/tree clipping; was playing around with CUAShader on the hair CUA