So, for example, if I create a portal to the end, everything will look normal in the end. But if I then use a nether portal, I will get this:

An example of going back to the overworld after having gone somewhere else would look like this:

I noticed this when I first installed your mod with the ore_stone_variants-1.10.jar but have tested it in the new ore_stone_variants-2.3.jar with the same result. You can look at the screenshots for my Forge version, etc. I suppose I should mention that my graphics card is a bit old. This is still reproducible if I have no other mods installed and have deleted the config file. When I tried reproducing this via the Legacy Aether mod portal, I was unaffected but when I used the Teletoro mod portal, which is much more clearly based on the Nether portals, I would have issues related to those above.

Here is a crash I got after fooling around in one of these bad-world-gen areas. This was with no other mods and I cut out a lot of repetitive stuff from the middle of the log so it wouldn't exceed the limit on pastebin: https://pastebin.com/hy8GVunD

Ahh. Okay, that makes sense. Seems like the advancements were causing even more problems than I thought. I'm not sure how this is possible, but I'll take another look at it soon. In the meantime, please try disabling advancements in the config file and let me know if that for sure reduces this problem for you. Thanks!

-Cat

Edit: I see that there are actually two separate problems here. The first one is a null pointer exception, which I can trace back to my mod, but which also only happens on world load and then stops. The other one is an out of bounds type exception that I can't trace back to my code or anything I've messed with, which makes me wonder if this is actually related to world generation. Unfortunately, that could make this pretty difficult for me to fix, because I wouldn't be able to trace down the specific issue. So yeah, please keep me posted after changing that setting. If that doesn't work, please also let me know if you've added or changed any blocks under config/ore_stone_variants_mods/. You said you were using a clean config (so no dynamic blocks), but I just need to make sure I get as much information as possible.

Thanks again!

That fixed it. I tried turning it back on again to make sure, and it did indeed break it again. Good luck figuring that one out.

I believe this has now been fixed. Please try build 2.4 as soon as you get the chance and let me know if it's working for you without disabling advancements. It should be out in the next 30 minutes to an hour. Thank you so much!

Github doesn't like to give me notifications for some reason. I turned the config back on with the new build and whatever you did fixed it, thank you.