What is the next step for building an inventory now that I have this?

I already responded to you in previous thread, and you’ve ignored everything I wrote.

Inventory objects should not be game objects, that’s wrong. Take your example, make things stack, see what happens.

You need to learn what model-view-controller architecture is. That’s the next step. As mentioned in yet another thread , to make the concept click, implement a chess or checkers board that is displayed simultaneously as 2d and 3d view, where you can interact with both views. That may be sufficient for the concept to click.

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