My big map is half loading -_-

I made a map that is sized 1024 x 1024. It loads, but unfortunately there are only blueish colored tiles. I can run the map, but i cannot really do anything because the maximum amount of cells I can use WE with is 230400 (480 x 480). I need to find a way to change that to 1048576 (1024 x 1024).

The game engine will glitch out after 480x480, you might get away with 512x512, but theres no way you could do 1024x1024
Even if you could, a map of that size populated with doodads would be incredibly laggy and would take most people 5+ mins just to load