Ugdhar

Is the loadComplete method running? I would double check via a log msg or breakpoint, just to be sure. Also, I've always seen oregen go in FMLCommonSetupEvent, not FMLLoadCompleteEvent. Probably doesn't matter, I would guess it's a nuance of the tutorial you're following.

Check out some of the vanilla classes that extend that same class, it looks like LoadingMessageEntry has some of them labeled. Sorry not more help, I haven't done much in the way of rendering myself.

What version is this for?

1.12 is no longer supported due to age. Please update to a modern version to receive support (I suggest the latest, esp. with 1.16.1 on the way). More information on supported versions can be found in the LTS link at the top of every page.

Use an external site to paste/upload it, such as https://gist.github.com/ (that's the one i use, if you prefer pastebin or one of those other things, go for it!) And I would still suggest trying to update your forge to the latest 1.14.4 version, it very well could help, not to mention there are other bug fixes and stuff in the newer ones.

It doesn't seem to tell in there, from what I can see. You could try posting the debug.log, it may have more information. Also, based on the same line numbers alternating throughout those errors, I would guess there's a chance it could be the recursion error fixed in forge 1.14.4-28.2.13 so you could try updating and see if that helps.

Try removing OptiFine and OptiForge, they are pretty hacky and could be causing your problem. If it still crashes, please post the new log.

it looks like the particles for the spawner are created in the net.minecraft.world.spawner.AbstractSpawner class. Check out how they do it there, in the tick() method as far as I can tell. Vanilla classes are a good reference for a ton of things

setupDecompWorkspace is not used in supported versions. Please update to a modern version to receive support. More information on supported versions can be found in the LTS link at the top of every page.

You typed the filename incorrectly, the file does not start with the word minecraft And you need to install Java 8 hotspot http://adoptopenjdk.net

Do not download the launcher, download the installer. If the installer does not work, please post the log (it will be in the same folder as the installer, after you run it, with the same name, but end with .log, possibly .jar if you are in windows and have file extensions turned off, which is the default I believe. But it will say it is a log file)

Have you tried something already? Are you trying to make armor like the vanilla armors, or armor with a completely custom model? I am not aware of any tutorials showing how to make armor items, however for vanilla-like armors, using the vanilla code as an example should be quite helpful. And then if it does not work as expected, post a link to code and logs here, with explanation of what's wrong. What about the classes (EquipmentSlotType and ArmorMaterial are actually enums) you mentioned are you confused about?

Please post your debug.log (pref as something like a github gist) and the code where you add your ore feature. Best way to share code is a github repository, if you aren't familiar with it, just google for a git/github tutorial, and start using it, you will not be disappointed! Great way to share code (just share a link to the github repository), and branches are great. Even if you don't plan on sharing your code or collaborating, using a git repository locally can save headaches and effort.

Looks like you might have some modid mismatches going on in some of your model/blockstate files

Always post the new log when that happens.

Post or look through your debug.log, there may be errors in there. Post your code as a github repository. There's obviously something wrong somewhere!

Please post the debug.log, it should have more information in it than the crashlog.

Install Java 8 Hotspot: https://adoptopenjdk.net

Post the new debug.log, or at the very least crashlog

What version is this for? What happens when you try? Please post the debug.log, preferably on an external site like a github gist, and link to it here.

Have you done any research or worked on this at all yourself since your last posting? If you have, it would better promote your issue to share your findings/progress. I think people would be more attracted to your issue if they felt you were actively pursuing it!

Found some potentially useful example code in this repo: https://github.com/Tropicraft/Tropicraft/tree/1.15 (thanks tterrag, heard you mention Tropicraft and its worldgen while watching the FAP recording) Sad thing, been tinkering with all this stuff for the past few weeks/month whatever, and there's theoretically going to be a bunch of changes to worldgen in 1.16, soooo....yup. It'll be back to the drawing board once forge releases start coming out for that! More than likely I will start a new thread for that discussion with the new version/features/way of doing things/whatever. But, until then, or even after then (if 1.15.2 keeps support, which I imagine it will), feel free to pop in here with any tidbits of info or advice related to this stuff!!

If you know Java, look in the minecraft code at net.minecraft.client.renderer.tileentity.ItemStackTileEntityRenderer for how vanilla does it. If you do not know Java, then you need to learn some before you can write a mod, or you will have a Bad Time.

These mods are known to be very hacky. If you remove them and try it, does it still crash? If so, please post the new debug.log. If not, you know what the problem is!

Really old versions aren't supported anymore. They should still be usable, but no supported is provided for them. In order to receive support, you need to be using a modern version, currently 1.14+ The LTS link at the top of every page has more information on supported versions.