Minetest: Airlike node wielditems with no tiles inherit surrounding node textures and can be animated (!)

[GreenXenith]

This is one of the weirdest and awesomest bugs ive seen in a while.
Create a node without tiles and the airlike drawtype:

minetest.register_node("test:animated", {
    description = "animated",
    drawtype = "airlike",
})

Short video demonstrating various oddities: https://youtu.be/JtNPsQIbvv0

Noticed behaviors:

• It will change sizes/shapes based on last wielded item (hold item, switch to the airlike node)
  
  
  
  • hand will make it 2x1
  
  
  • Mesh will make it tiny
  
  
  • Node/nodebox/anything else will make it normal
  
  
  • Something makes it 1x2, haven't figured out what it was yet
  
  
• Inherits surrounding nodes
• Not in video: Inherits node texture on punch for about a second
  
  
  
  • In that brief period yaw will change the selected texture (if the node has multiple)
  
  
• Not in video: Works on any drawtype*, but it will always be a cube (which means it may look funky)
• *it does not work on butterflies or fireflies
• Changes based on yaw (or extreme pitch, up or down)
• Can be animated
• Sometimes applies one texture to all sides
• Upon entering a new chunk where there are no textures it defaults to a font atlas

Discovered by @LoneWolfHT, tested more by me.

__Two things:__
What the heck :)
and wielded items can be animated; this needs to be an actual feature.

[LoneWolfHT]

Animated water sources look great as a wielditem too

[rubenwardy]

The fuck

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[Desour]

Maybe related: #7304

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and wielded items can be animated; this needs to be an actual feature.

:+1:
A little bit related: #4758

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Imo this is not a bug. The modder is responsible to give the item a good look and airlike nodes being completely invisible in inventory and wieldhand would be worse. Ergo this is even a bugfix for the bug of not being able to distinguish between airlike node items and "no item". (I don't think that the bug will reproduce enough to cause a plague.)
A note in the documentation would probably be good.

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Edit: Btw boat makes it 2*2*1.