Any way to improve textel density of this model?

i have this bus model, obviously the model is quite large, so uv unwrapping it brings up some issues when it comes to the resolution of the textures applied to it, as far as i know ive done everything i could, such as creating multiple textures for one body(which im not even sure will work with roblox considering the last time i used surface appearance it only applied one of the multiple in the model) but it seems to be at a standpoint considering the fact that the uv on the side of the bus takes up as much space as it can before it goes out of bounds, i was wondering if there was a way to somehow bypass this or some sort of fix, and possibly without having to add a seam across the middle of the bus
here is an image of the bus, with a checker texture, and the buses uv map
image

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Roblox’s 1024 limit is pretty rough. In my experience personally, I’ve never found a way around it.

On larger stuff that I have to texture, I just cut it into smaller pieces and work with it that way. Pain, but yeah.

If I can, I just export each material group as it’s own mesh and manually apply basic textures in Roblox and put decals and stuff on manually. yeah, dumb fix, ik