I am designing a 2 million grid maze, on Blender, but at the moment, but at the moment, i already up to 135,000 grids, using photorealistic 3 meter high by 2m long x 100 mm thick an old rustic concreat wall, at the moment i did about 800m x 500m real world scale, but when i reach 2 million grids (cubes) then i deleat walls to make it resemble a maze, also i did Hexagon mirror maze, once i complete Maze, export to UE4, i cannot show reasons are 220,000 KB file size but when i finish 3.2GB. is 2 million grids enough?