# Perpendicular Surface blend/fillet

**URL:** https://discourse.shapr3d.com/t/perpendicular-surface-blend-fillet/18076
**Category:** Modeling Questions
**Created:** [March 17, 2022, 3:02am UTC](https://discourse.shapr3d.com/t/perpendicular-surface-blend-fillet/18076 "2022-03-17T03:02:44Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![eastrise15](https://avatars.discourse-cdn.com/v4/letter/e/c4cdca/32.png) [@eastrise15](https://discourse.shapr3d.com/u/eastrise15)
#### Post date: [March 17, 2022, 3:02am UTC](https://discourse.shapr3d.com/t/perpendicular-surface-blend-fillet/18076/1 "2022-03-17T03:02:44Z")

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Hi all - brand new here, so apologies in advance for the entry level type question. I have been using Shapr3D for a couple months now and am looking to blend two perpendicular surfaces together with an internal fillet/radius. Can’t quite seem to get the sequence right or I am chasing down the wrong rabbit hole. Pictures attached is what I have (grey part) and what I am looking to recreate (purple part).

Can anyone help walk me through this step by step?

 ![surfaces to blend](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/0/022109fa938c7e85baff1b68d03d9c84203f49bf.jpeg)

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### Author: ![eastrise15](https://avatars.discourse-cdn.com/v4/letter/e/c4cdca/32.png) [@eastrise15](https://discourse.shapr3d.com/u/eastrise15)
#### Post date: [March 17, 2022, 3:03am UTC](https://discourse.shapr3d.com/t/perpendicular-surface-blend-fillet/18076/2 "2022-03-17T03:03:41Z")

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and second pic

 ![example](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/c/ce72db6a6b9ffb4256bf2da23f3a77a1e0e6896c.jpeg)

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### Author: ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)
#### Post date: [March 17, 2022, 3:59am UTC](https://discourse.shapr3d.com/t/perpendicular-surface-blend-fillet/18076/3 "2022-03-17T03:59:01Z")

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On your first picture, is the gray wall and the floor separate parts? If so, you need to combine the parts into one using **Union** first. Then you can do the fillet radius.

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### Author: ![eastrise15](https://avatars.discourse-cdn.com/v4/letter/e/c4cdca/32.png) [@eastrise15](https://discourse.shapr3d.com/u/eastrise15)
#### Post date: [March 19, 2022, 12:43am UTC](https://discourse.shapr3d.com/t/perpendicular-surface-blend-fillet/18076/4 "2022-03-19T00:43:42Z")

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TigerMike - thank you much!!! That is exactly what it was, appreciate you.