Question Getting fog shader to work correctly in combination with a cell + outline shader

Hiya,

I'm working on a project using orthographic camera. Normal fog options don't seem to work with orthographic cam so I turned to using a fog shader on a plane as per this tutorial: https://www.lmhpoly.com/tutorials/unity-urp-tutorial-orthographic-fog-plane-shader

That fog shader works fine on the model used in the example scene of that tutorial, which uses urp/lit materials. However, if I add objects from my own project to the scene, the fog plane acts as just that, a plane. See gif:



There's no fog effect to speak of un my 'pillar'. This pillar is using a 'Stylized Surface with Outline' shader from the 'Flat Kit: Toon Shading and Water' asset pack from the Asset Store:
https://assetstore.unity.com/packages/vfx/shaders/flat-kit-toon-shading-and-water-143368

I'm wondering if anybody could have an idea what could be causing this problem? What are possible variables I could tweak to make it work? Because the shader on the pillar comes from a paid asset I doubt I can share that here. The fog shader is free for grabs though, so that I can share:





Interestingly, the FlatKit asset pack also has a Stylized Surface Shader without outline, and somehow, if I give my pillars that shader, the fog DOES work. Unfortunately I really need to use the shader with outline though.

If anybody has any idea on what I should be looking at to fix this that would be amazing. I'll be frank, I'm very new to shaders, so pretend I'm 5 years old when explaining anything ^^;;

Thanks and cheers!