[Feature Request] Extended geometry attributes for procedural textures

[Frautcres]

With the introduction of velocity and age as a geometry attribute, a long time silent wish of mine isn't that far from reach. I've had ambitions to have explicitly defined parameters

Here are two examples in which I feel it could be used: Capturing total surface movement! Pictured in this example is the initial Vertex color or UV coordinate input and geometry attribute output for a simulation, which could be stirred around however the user may like, for example the user could use this to project higher-frequency textures or rather algae on the surface of a lake.

Toothpaste and other cycling patterns! As shown here in this generic image I found some toothpastes have cyclic patterns which could be rather complex to handle as multiple fluid materials mixed together, so I would suggest a more efficient alternative would be to texture the outside surface using an emitter which would capture the cyclic texture space, in the example that I have given you could use the geometry attribute as a texture coordinate to sample from a cross section of what the paste should look like.

The problems that I see as far as implementation is currently is a matter of interpreting and interpolating the input geometry as a continuum of channels, and how to make the interface usable, the first I lack experience in, the latter I'll give my current idea, however I haven't yet seen the latest build which may contain some interface for the new geometry attributes: I could see the geometry attributes being its own section, with settings and or toggles to enable each geometry attribute if needed/unneeded, with settings pertaining to units of measurement if scale is important, and I could see this being an important section for more advanced mixture settings if and when that feature becomes more useable.