SVGs themselves are just an image format; but because of their vector nature, they could easily be mapped onto values from a simulation in a physics engine — at least, in the game physics sense of the word, rods and springs etc., as a fluid simulation is clearly a better map to raster formats.

If that physics engine were itself a good model for the real world, then you could do simulated evolution to get an end result that is at least as functional as a bike (though perhaps it wouldn't look like a traditional bike) even if the only values available to the LLM were the gross characteristics like overall dimensions and mass.

But I'd say the chance of getting a pelican SVG out of a model like this is mostly related to lots of text describing the anatomy of pelicans, and it would not gain anything from synthetic data.

SVGs are just 2D geometries, and I can assure you that almost every GIS project in the world uses vector data to model the physical world.

Whether it's a good model or a model that the LLMs can manipulate, I have no idea. But it's entirely plausible that I could feed an SVG map and ask it geospatial reasoning questions like how far between A and B, what's the nearest grocery store, etc.