Spiral Stair Case (Vanilla NMS / No Glitching)

The stairs I am going to teach you are using the short stairs, small triangles, small floor tiles, half size walls and the shorter short walls. However this presents a small problem. These small pieces do not like to 'mate up' with the larger ones. It usually ends up off centered. So I like to make a larger circle of the large floor tiles around the spiral stairs to make the connection better (centered).

Ok, having said all that, here we go;
1st lay down 3 large triangles and then 1 large square floor tile and then one more large triangle, as in this pic.

Next move the large square tile to the outside of one of the triangles.

Then place tiles on each side of triangle #5 (#7 & #8)

Now you want to continue around the 'circle' inserting large triangles until you have a 12 sided circle.

Now that you have a 12 sided circle of large triangles go around the outside and place a large square floor tile against the triangles, fill the circle.

Ok, this larger outer ring will be 'connected' to the stair case for later use.

Now we need to remove the inner triangles BUT not all of them! Leave 2 triangles overlapping each other.

Ok, we left those 2 triangles so we can build off of them and keep our 12 sided structure!

Next place 2 small triangles on the sides of the 2 large triangles that we left in place.

Ok, now that we have preserved the 12 sided spacing, remove the 2 large triangles.

And now fill in the 12 sided circle of small triangles in the center of our formation.

Finish filling out the small circle with small triangles.

Now place a small square tile against each of the triangles, fill the ring with them.

Now decide where you want the entrance on the bottom floor to be and place a half-wide arch there.

Now we place the short walls to setup snap points for the stairs. Going around the small circle place 1 short wall, then in the next place put 2 short walls, and in the next place put 3 short walls and then a full size half-wall.

Do this pattern 1, 2, 3, F all the way around the small circle.

Now select the small stairs and place one on the first short wall.

Continue placing short stairs as shown.

The 'outer shell' (walls) can be arches or half walls, doesn't matter, but they DO need to be there, as they will continue the snap points for the stairs.

Go as high as you want to! :steamhappy:

Enjoy!