# Decimation Issue

**URL:** https://forum.nomadsculpt.com/t/decimation-issue/9737
**Category:** Bug Report
**Created:** [January 18, 2023, 11:08pm UTC](https://forum.nomadsculpt.com/t/decimation-issue/9737 "2023-01-18T23:08:33Z")
**Posts on this page:** 9
**Page:** 1

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### Author: ![RogerRoger](https://avatars.discourse-cdn.com/v4/letter/r/b2d939/32.png) [@RogerRoger](https://forum.nomadsculpt.com/u/RogerRoger)
#### Post date: [January 18, 2023, 11:08pm UTC](https://forum.nomadsculpt.com/t/decimation-issue/9737/1 "2023-01-18T23:08:33Z")

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The latest update seems to have changed the way things are decimated such that the object doesn’t hold its shape as well. Here are my settings:

 ![image](https://europe1.discourse-cdn.com/flex005/uploads/nomadsculpt/original/2X/0/0499b27dd2fe37609dabed71183235c75e9cc905.jpeg)

Here is an example of what I start with:

 ![image](https://europe1.discourse-cdn.com/flex005/uploads/nomadsculpt/original/2X/5/54b291c71929b5690110638577be90643741892b.jpeg)

Here is what I would get before:

 ![image](https://europe1.discourse-cdn.com/flex005/uploads/nomadsculpt/original/2X/0/0ea1593630466ffef5ef8e01be9da9244c72cfb4.jpeg)

Here is what I get now:

 ![image](https://europe1.discourse-cdn.com/flex005/uploads/nomadsculpt/original/2X/b/bd511acbd17bbfdcce1d0a6429d2a82dad693a0a.jpeg)

iPad Pro 11”  
iOS 16.2  
Nomad 1.71

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<div class="post-metadata">

### Author: ![RogerRoger](https://avatars.discourse-cdn.com/v4/letter/r/b2d939/32.png) [@RogerRoger](https://forum.nomadsculpt.com/u/RogerRoger)
#### Post date: [January 18, 2023, 11:20pm UTC](https://forum.nomadsculpt.com/t/decimation-issue/9737/2 "2023-01-18T23:20:20Z")

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A couple more pics:

Before 1.71:

 ![image](https://europe1.discourse-cdn.com/flex005/uploads/nomadsculpt/original/2X/d/db56c10a8e46d7b4fb843366f126a8f44155f63f.jpeg)

Now:

 ![image](https://europe1.discourse-cdn.com/flex005/uploads/nomadsculpt/original/2X/5/5087e3a637851e5c55e80b51c0710221d099ced2.jpeg)

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### Author: ![jim1234](https://avatars.discourse-cdn.com/v4/letter/j/5e9695/32.png) [@jim1234](https://forum.nomadsculpt.com/u/jim1234)
#### Post date: [January 18, 2023, 11:24pm UTC](https://forum.nomadsculpt.com/t/decimation-issue/9737/3 "2023-01-18T23:24:09Z")

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I’ve just tried this and get good results same as your before pics. My settings are same as yours, so not sure what’s going wrong for you. I’m on M1 Pro.

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### Author: ![RogerRoger](https://avatars.discourse-cdn.com/v4/letter/r/b2d939/32.png) [@RogerRoger](https://forum.nomadsculpt.com/u/RogerRoger)
#### Post date: [January 18, 2023, 11:42pm UTC](https://forum.nomadsculpt.com/t/decimation-issue/9737/4 "2023-01-18T23:42:40Z")

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Figured it out (sorta). Before, I would decimate at 50% over and over until I got down to where I wanted to be and it kept its shape. Doing that now causes it to loose shape along the way until it gets really far off.

I took the slider and slid it to 1% and it decimated in one round and kept its shape like it did before.

Side note: when decimating at 50% over and over, I get patches of less-decimated areas. Almost like it’s sacrificing some areas shape to keep higher resolution in some areas. See vid:

[https://europe1.discourse-cdn.com/flex005/uploads/nomadsculpt/original/2X/4/4d62c3a6d2a6887ef2e15b56c698ba41f9c9c84e.MOV](https://europe1.discourse-cdn.com/flex005/uploads/nomadsculpt/original/2X/4/4d62c3a6d2a6887ef2e15b56c698ba41f9c9c84e.MOV)

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### Author: ![stephomi](https://dub1.discourse-cdn.com/flex005/user_avatar/forum.nomadsculpt.com/stephomi/32/19583_2.png) [@stephomi](https://forum.nomadsculpt.com/u/stephomi)
#### Post date: [January 19, 2023, 12:09am UTC](https://forum.nomadsculpt.com/t/decimation-issue/9737/5 "2023-01-19T00:09:05Z")

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You can send me the model (email in about menu) and I’ll take a look.

I tried to make a similar shape but it’s working well (thin box with a few holes and a bit of sculpting thing) but it’s working well.

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### Author: ![jim1234](https://avatars.discourse-cdn.com/v4/letter/j/5e9695/32.png) [@jim1234](https://forum.nomadsculpt.com/u/jim1234)
#### Post date: [January 19, 2023, 12:17am UTC](https://forum.nomadsculpt.com/t/decimation-issue/9737/6 "2023-01-19T00:17:55Z")

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I got good results decimating repeatedly at 50 percent, so I think there is still some issue for you. Hope you solve it.

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### Author: ![RogerRoger](https://avatars.discourse-cdn.com/v4/letter/r/b2d939/32.png) [@RogerRoger](https://forum.nomadsculpt.com/u/RogerRoger)
#### Post date: [January 19, 2023, 1:20am UTC](https://forum.nomadsculpt.com/t/decimation-issue/9737/7 "2023-01-19T01:20:17Z")

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@jim1234 thanks for trying it and the feedback!

@stephomi I just sent you the file. Thank you!

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### Author: ![stephomi](https://dub1.discourse-cdn.com/flex005/user_avatar/forum.nomadsculpt.com/stephomi/32/19583_2.png) [@stephomi](https://forum.nomadsculpt.com/u/stephomi)
#### Post date: [January 19, 2023, 12:33pm UTC](https://forum.nomadsculpt.com/t/decimation-issue/9737/8 "2023-01-19T12:33:14Z")

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It’s a size coordinate issue, if you scale down the mesh (1/50) and « bake » the matrix, it will work a bit better.  
I should be able to improve that.

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### Author: ![RogerRoger](https://avatars.discourse-cdn.com/v4/letter/r/b2d939/32.png) [@RogerRoger](https://forum.nomadsculpt.com/u/RogerRoger)
#### Post date: [January 19, 2023, 4:45pm UTC](https://forum.nomadsculpt.com/t/decimation-issue/9737/9 "2023-01-19T16:45:36Z")

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Thank you!
