> We've seen performance benefits from using 512x512 tile sizes over 256x256 on high-res or large screens.
Oh that's interesting! Would it be possible to share some more specific details (either here or DM if you prefer)? What particular improvements? Improved FPS? Faster loading of data?
Definitely something we'd like to hear more about.
I assume a 512 tile cover the same area as 4 256 tiles (and not the same area at 4x resolution)? AFAICT this reduces the number of network requests to 1/4, which could indeed help with certain aspects of performance. The whole terrain is then split less granular (again 1/4 tiles), I wonder if this comes with any downsides.
> If supporting mixed tile sizes (even limited to 256 and 512) in 3D is complex
Mixing arbitrary tiling schemes is tough: Tiling is at the core of the terrain logic and controls a lot of both internal and user-facing behavior. Mixing 256 and 512 would definitely be less tricky but still not a freebie.