Static shapes. He wants to build on it, not in it. The thing is, blockland building grid would stay the same, you wouldnt be able to have your bricks going up at one point and op on the opposite side, its not like it has a functional brick gravity system.
Ummm, what? Have you even ever played on that planet map? You could go in the planets, and there would be a static shape on the inside you built on. Each had an exterior and interior look, so you could get the feel of looking at different atmospheres.
64x64x64 is pretty big small
if you really needed to though you could always just split each hemisphere into eighths and it'd be four times as big as 64x
Fixed. But yeah, tbh I'd make the bricks like eight hemispheres, and apply the same property as zone bricks.