There are 4 different states for things in the world:
- Regular node in world
- Item stack on ground
- Item entity (falling)
- Falling node entity
The entity states are not interactable at all, and regular node
doesn't rotate. We can help differentiate node-in-air vs
node-stack-on-ground with a shadow visual.
Sometimes a node will get stuck as an entity inside another node's
negative space (e.g. a nodebox) and having a way to tell that it's
not a real one should maybe help.
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