Hiya, folks. I’m trying to build a spiral staircase within a decreasing radius tower (theoretical build, not actual architecture). The stairs are built along the inside wall of the tower with the central shaft of the tower remaining open. I’ve built the perfectly symmetrical stairs, but can’t seem to figure out how to gradually decrease the radius of the stairs toward the top. Thus, the stairs protrude from the tower’s exterior surface. (FYI, the base diameter of the tower is 60’ and the top is 50’, the tower height is 190’.)
Would love any input or suggestions on tutorials, etc., that might explain this in depth.