How to make a complete smooth ramp to be spiral stairs

Hi I am creating my prototype still and need to create spiral stairs.

However I want them to be smooth or like a ramp.

Can anyone recommend any ideas?

I don’t know whether this helps, as I’ve very new myself, but I’m also playing around with spiral staircases at the moment…
There’s a tickbox in the brush settings for ‘sloped floor’. With this set, you seem to get a spiral ramp with a smooth gradient. I hope this solves the problem!