Draco18s

You're going to need to provide more detail and/or code.

A factory is a class that creates instances of another class. (What is a hammer factory? Why, its a building that builds hammers...) https://en.wikipedia.org/wiki/Factory_method_pattern

You're likely doing something wrong. You should stop doing it wrong.

Why is #layer0 here? This is causing the game to look for a file named testitem#layer0.json which presumably doesn't exist.

Read your error:

Also, you're using the arrow anti-pattern.

Here, take a look at these three classes: https://github.com/Draco18s/ReasonableRealism/tree/1.12.1/src/main/java/com/draco18s/hardlib/api/capability The interface is here: https://github.com/Draco18s/ReasonableRealism/blob/1.12.1/src/main/java/com/draco18s/hardlib/api/interfaces/IMechanicalPower.java

You should be using Capabilities, if you aren't on a version of Minecraft with Capabilities, update. As to your question: there is no Forge-supplied action that will do what you are asking.

It works just fine...if you tell Minecraft how to render the item. ModelLoader.setCustomModelResourceLocation(item, meta, resource)

Read your errors. Also, without your code, we can do fuckall to help you.

Look at the dispenser.

If I understood your question correctly: Yes. But I can't tell you more because I don't know WTF you're trying to do. Also: "Whether." The weather is about whether or not you need an umbrella.

It's called "threads." And treads are dangerous things.

Option 1: See if they have a github Option 2: Use JD-GUI

You should not be using the slot to check validity, you should have some ability outside of the inventory and slot classes to check validity. The reason the slot class has an isValid check is so that the client cannot click a stack into the slot and can make that determination without requesting any information from the server.

If the item isn't allowed, return the input stack unaltered. https://github.com/Draco18s/ReasonableRealism/blob/1.12.1/src/main/java/com/draco18s/ores/entities/capabilities/SiftableItemsHandler.java#L14-L17

Minecraft assumes that all gui textures are 256x256 unless otherwise specified. 64/256 = 0.25

Try gradlew.bat instead of just gradlew.

default implementation factory It would return an instance of the implementation.

A factory is just a class that constructs an instance of something else. It has common parameters and returns an arbitrary object without the need for reflection.

Those are vanilla style variant listings, which means they need to be alphabetical. active=false,style=red

So, what's not working?

You don't need that line. I only highlighted lines 65 through 71, that was from line 64.

That should work. You still need to invoke that method of course, but it looks correct. And it needs to be client-side-only, as does all other model registration code.