# OffsetSrf Problem

**URL:** <https://discourse.mcneel.com/t/offsetsrf-problem/108232>\
**Category:** Rhino for Mac\
**Created:** [September 7, 2020, 12:14am UTC](https://discourse.mcneel.com/t/offsetsrf-problem/108232 "2020-09-07T00:14:16Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![miano](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/miano/32/762004_2.png) [@miano](https://discourse.mcneel.com/u/miano)\
**Post date:** [September 7, 2020, 12:14am UTC](https://discourse.mcneel.com/t/offsetsrf-problem/108232/1 "2020-09-07T00:14:16Z")

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In the attached file I have a polysrf. When I run offsetsrf on it I get chaos. I was wondering the cause?

 ![Screen Shot 2020-09-06 at 8.04.42 PM](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/b/0/b09c2b0ceb5d9a24dbe6a52c220e0c83819cfd21.png) ![Screen Shot 2020-09-06 at 8.05.17 PM](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/7/c/7c77e91353fec9b71662fbac1eabdc6c91bec19e.png) [Problem OffsetSrf.3dm](https://discourse.mcneel.com/uploads/short-url/ndwAG2JFR6biHOTiNpGEWsSNaty.3dm) (8.0 MB)

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**Author:** ![Helvetosaur](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/helvetosaur/32/635974_2.png) [@Helvetosaur](https://discourse.mcneel.com/u/Helvetosaur)\
**Post date:** [September 7, 2020, 7:30am UTC](https://discourse.mcneel.com/t/offsetsrf-problem/108232/2 "2020-09-07T07:30:52Z")

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Yeah, OffsetSrf frequently has problems with complex objects. A workaround for this particular object is to OffsetSrf Solid= **No** , then DupBorder the two polysurfaces and Loft between the borders. Then Join all up into a closed polysurface.

[OS-Loft.3dm](https://discourse.mcneel.com/uploads/short-url/jB023ej5BoQBtl69UfH1UJapBvX.3dm) (1.5 MB)

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**Author:** ![DiegoKrause](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/diegokrause/32/257432_2.png) [@DiegoKrause](https://discourse.mcneel.com/u/DiegoKrause)\
**Post date:** [September 7, 2020, 8:39am UTC](https://discourse.mcneel.com/t/offsetsrf-problem/108232/3 "2020-09-07T08:39:10Z")

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if you add a few blends or sweep2 on each crease in the input surface it works ok

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/d/2/d2ce58a36bacdc63aadc2ca2f95104c7444cd42e.png)

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**Author:** ![miano](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/miano/32/762004_2.png) [@miano](https://discourse.mcneel.com/u/miano)\
**Post date:** [September 7, 2020, 5:37pm UTC](https://discourse.mcneel.com/t/offsetsrf-problem/108232/4 "2020-09-07T17:37:12Z")

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Thanks,

It works----but I have a lot of them to do. ☹

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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 8, 2020, 9:33pm UTC](https://discourse.mcneel.com/t/offsetsrf-problem/108232/5 "2020-09-08T21:33:58Z")

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Hello - if you ask for Corners=Round, the result is cleaner - round corners are the more ‘true’ offsets and since surfaces do not need to be extended, it is more reliable as well.

-Pascal