After spending literal hours trying to troubleshoot a mod over an issue that was completely arbitrary, I've taken it upon myself to begin the unofficial RDR2 modding limitation document. This not only has some useful information on how to do stuff but also can be used to troubleshoot if any of your mods aren't working the way they should. RDR2 modding can be a hellhole and while I only just started this I'm allowing you to comment your own finds on the document as well so that we as a community can finally help each other figure out any common issues we're having with our mods.

If you leave a comment on the document, be sure to be as precise as possible about what the issue is and what exactly causes it and do not add things that are relevant to only one specific mod. I would prefer for it to focus on actual game-breaking or immersion-breaking bugs but I did include a few things that aren't.

Google Docs

Unofficial RDR2 Modding Limitations Document

This will be a very helpful thread. I can add that as far as I know you can't add custom .bk2 movies (not intro movies), or custom pictures to highlight certain story elements - the game won't load them, and you'll just get an infinite black screen. If someone knows a way around this to add them, please post the solutions here.