The Problem

Currently, there is no way to fully fill in 3D areas. The typical solution is to spam //fill for every later, but it'd be much more convenient to use another command to fill in the entirety of an enclosed 3d area.

A Solution

A new command for filling 3D areas.
Perhaps //fill-3d .

Alternatives

Spam //fill across every layer. This is extremely tedious for large 3D shapes.

Anything Else?

No response

Fill is for 3D areas, you're going to need to elaborate on specifically the difference you're referring to here

Not required as I've found an alternative solution that uses //replace instead.