Since sprites are limited to 4096px, it would be cool if the graphics mods could supply images in slices to bypass that restriction.
I made a proof of concept mod:
https://www.patreon.com/posts/visible-planets-117283288
I guess higher resolution texture mods would need to split it to 1 planet per mod though because of the mod portal file size limit

I see that you've made a modified version of this mod that supports tiling, are you able to somehow upload the code without the sprites so I can have a look at how it works without downloading a 1.4gb file?

I'm unsure how to approach supporting something like this, especially considering I would want to still support other mods that likely won't provide multiple sprites per planet. If your implementation is only a few changes to the existing code, perhaps you could consider making a pull request?

There is a good chance that something like this won't be added to this mod if it requires large changes everywhere. If you do have a working version though, feel free to upload it as a separate mod under something like "Extra HD Visible Planets" or something.

the old way of registering the sprites, by just changing the space location icon wouldnt work anymore, so there would need to be an interface or something
also currently the rotation isn't working anymore because that had been too much work and my planets are illuminated from one side so it had looked weird anyway

you can download the 1.2.1, it doesn't include graphics and is only 500KB large

I'll look into it later, I don't currently have time to figure out how to work with the new structure, and I don't want to break modded planets. (Including the retextures for base planets.)