# Any tips on how to model these Stairs Blending into Topography?

**URL:** <https://discourse.mcneel.com/t/any-tips-on-how-to-model-these-stairs-blending-into-topography/89452>\
**Category:** Rhino for Windows\
**Tags:** tips, rhino6\
**Created:** [September 26, 2019, 2:37pm UTC](https://discourse.mcneel.com/t/any-tips-on-how-to-model-these-stairs-blending-into-topography/89452 "2019-09-26T14:37:03Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![kacperpach42](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/kacperpach42/32/162273_2.png) [@kacperpach42](https://discourse.mcneel.com/u/kacperpach42)\
**Post date:** [September 26, 2019, 2:37pm UTC](https://discourse.mcneel.com/t/any-tips-on-how-to-model-these-stairs-blending-into-topography/89452/1 "2019-09-26T14:37:03Z")

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Here’s what I try to achieve with my steps.

 ![maat](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/9/4/94a95e95a26fea62ebd3ed314296f3524729068b.jpeg)

Here’s my project:

 ![211-SKE-035-P-Option%201950s%20steps](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/6/6/6642ebb5f97c571b46344e1d46b5af6e9db5bdf5.jpeg)

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**Author:** ![pascal](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/pascal/32/479395_2.png) [@pascal](https://discourse.mcneel.com/u/pascal)\
**Post date:** [September 26, 2019, 4:15pm UTC](https://discourse.mcneel.com/t/any-tips-on-how-to-model-these-stairs-blending-into-topography/89452/2 "2019-09-26T16:15:20Z")

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Hello - here’s a simple example, some variation on this may do it -

1. Make start and end curves for the shape, cyan, and `TweenCurves` to get the interior curves. (Blue)  
 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/f/8/f807e853f3f656469e4c8a129260404e5e79546f.png) Keep the curves simple.
2. `project` the curves, with Loose=Yes to your surface.
3. Loft pairs of projected curves ‘Straght sections’ style
4. Turn on points for the surfaces
5. Level pairs of points in the interior of the steps

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/b/f/bf13e9a24cb4f51c274262bd972a8ccdd4414c66.png)

- leave the end 2 or 3 points alone.

1. Extrude the ‘leading’ edges downward to form the front of the steps. Trim and clean up…

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/b/8/b8253f0c407a7628461f99d60d5a4f6c5867d4b9.png)

[StepsInSurface.3dm](https://discourse.mcneel.com/uploads/short-url/mc2AhQ0wp90iyFHzikezmo7e3qF.3dm) (331.6 KB)

-Pascal

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<div class="post-metadata">

**Author:** ![kacperpach42](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/kacperpach42/32/162273_2.png) [@kacperpach42](https://discourse.mcneel.com/u/kacperpach42)\
**Post date:** [September 26, 2019, 5:47pm UTC](https://discourse.mcneel.com/t/any-tips-on-how-to-model-these-stairs-blending-into-topography/89452/3 "2019-09-26T17:47:10Z")

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Thank you @pascal  
This is really helpful