Reposting Salcarr’s suggestion here, so it can hopefully actually get seen.
Need a section for additional postprocessing, similar to additional engrams and additional structures, etc. I ran into a similar problem as he did. Essentially, as of now, you have to add a post processing effect for a buff to the core game file under buff post processing effects, but in doing so, the mod is not stackable. As he suggested, having a section for additional post processing effects that works like the additional engrams and additional structures, but for our own post processing effects for buffs or otherwise, would help out a lot! PLEASE ADD THIS!