No Cel-Shading
Finally, I've been able to make my no cel-shading mod work on TOTK!
This mod description is almost identical to the one I wrote for BOTW. That's because almost all the issues that come with disabling cel-shading still exist in TOTK. Believe me, I've tried to fix some of them, but just like with BOTW, I can't get emission to work with this mod.
The only notable difference from the BOTW version of this mod is that the sky no longer turns into a psychedelic acid trip, haha!
The 7zip file includes two mod options: one with an updated RSTB included and should be used only when you are not using any other mods. The other option has no RSTB included, so for that, you can patch your own RSTB using the provided patch.yaml file.
This mod assigns a custom model to the camera actor. The model assigned to it has the "Hylia Leaking" material applied.
Remember that one spot on the bridge over Lake Hylia where the cel-shading is disabled? Yup, you guessed it, the model I assigned to the camera has the exact same material applied to it, which disabled the cel-shading EVERYWHERE.