So I have a tileset thats 8x3900 and when I download it only about 1/3 of it appears and the rest is blank.
Could you provide a screenshot to illustrate the problem? I’m not sure I understand what it means for a tileset to only appear for 1/3rd.
Can you provide a little more context in that screenshot? Presumably this is Tiled, but where in Tiled? Does this affect the tilesets panel and the Tileset Editor? Do the tiles remain invisible even if you zoom in? What happens if you use those invisible tiles?