Yeah, the solution is as imperfect as simple )
When I made it, I had a thought that that stuff is just a sphere, split at 8 parts (8 pieces) - they are corners; then the corners are joined with edges made of a fourth of a cylinder (12 pieces, 4 for width, 4 for height, 4 for depth) and finally the sides of a box are made of planes (6 pieces).