# .unexpected revolve change

**URL:** <https://discourse.shapr3d.com/t/unexpected-revolve-change/17531>\
**Category:** Modeling Questions\
**Created:** [February 19, 2022, 5:15pm UTC](https://discourse.shapr3d.com/t/unexpected-revolve-change/17531 "2022-02-19T17:15:46Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Peterjfirth](https://avatars.discourse-cdn.com/v4/letter/p/ccd318/32.png) [@Peterjfirth](https://discourse.shapr3d.com/u/Peterjfirth)\
**Post date:** [February 19, 2022, 5:15pm UTC](https://discourse.shapr3d.com/t/unexpected-revolve-change/17531/1 "2022-02-19T17:15:46Z")

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 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/3/3beced69f00832215cb805a71a20b71e04b1dbd0.jpeg)  
I wanted to profile the bottom of this bottle as I originally made it flat. I went back to the original sketch and then found that the diameter of the main object was wider than the sketch. How can that be?

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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:** [February 19, 2022, 6:23pm UTC](https://discourse.shapr3d.com/t/unexpected-revolve-change/17531/2 "2022-02-19T18:23:53Z")

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After you did the Revolve, did you use the Shell tool?  
If so, did you use a negative number for the shell?