A new goo type suggested by Skyboy.

Fling it to place a light source, an alternative to torches per se.

Potentially it can be a temporary light source, but I don't have issues with it being permanent. This new light source would be a custom "air" block with some visual representation to make it clear that it exists. (It would have a hit box, no collision, and possibly custom particles)

Technical design notes:

• Definitely have it consume the goo, I don't want the entity to be necessary for the light source to exist, because entities are costly.
• Have it be about the same value as a torch, and about as useful. As a torch alternative, it shouldn't be cheaper.

Evaluation design notes:

• Change many things to contain light goo:
• Shroomlights
• Glowstone dust and Glowstone, sort of obviously
• Redstone dust (technically it glows, just give it a little bit)
• Torches
• Prismarine (Heeeeey!)
• Potentially others

New Procurement Routes:

• Logic + Energetic mixes into Radiant?
• Metal + Radiant mixes into Regal?

Interaction Design Notes:
Throw the goo and it consumes a bit (4?) to place the glowing block. That's basically it. It's a remote torch, in goo form

Radiant goo is a ton of fun, and exists.