Particle system showing correctly in fog?

[Vioxtar]

I'm currently working on a dynamic fire mod which uses particle systems:

https://files.facepunch.com/forum/upload/710/6e20a7f4-2bf9-404b-8a3b-d664ac5d4070/image.png

And probably to no surprise, the particle systems completely ignore fog once its there:

https://files.facepunch.com/forum/upload/710/14f498d1-c71b-4745-b919-c4de4161507a/image.png

I asked around on the mapping section (I figured this is less about Lua) and it was unfruitful, so asking here - any way to fix these? Either through Lua, a VMT edit of the spritecards, or even directly through the Source particle editor? I know built in particle systems display correctly:

https://files.facepunch.com/forum/upload/710/756d239a-2e96-4d2f-93ca-e7d84ac9bbcb/image.png

[Rubat]

Look at the vmt file of the particle that works?

[Vioxtar]

Apparently it's a shader thing - setting it to UnlitGeneric and additive seems to have worked, but at the expense of the animation fluidity and the dark tones of the material.