andyz

Yes, because it is a modification of the curved stairs code which constrains the edges to 90 degrees. The difficult bit is steps that span corners so have to be split. I don't know the best way of sharing it...

As I wanted stairs with square corners not curved edges I added a 'squared' option to stairs - seems to work:

Thanks I grabbed the source and it's quite readable and extendable!

Any reference for API to create extra editor tools for generating more meshes than available in the shapeTool? Basically want to do like the Geometry_Interface but with my own procedurally generated geometry options and fully integrated into ProBuilder and its undo etc.

It is fine to combine 3 stairs to make such a staircase but the curved meshes mean you would have to manually push out the vertices to make a square corner so would be great to have it as part of the tool since many stairs are not curved around corners

I'm new to ProBuilder and love the stairs creation but I really need stairs with a square turn, not a curved turn, to make stairs like this: