Bevel Bug #40100

New Issue

Vlad Mafteiu Scai · 2014-05-08T21:28:08+02:00

Vlad Mafteiu Scai commented

2014-05-08 21:28:08 +02:00

System Information
Win 8 64, 2x MSI 780 Lightning

Blender Version
Broken: (example: 2.70.5, 7660218, see splash screen)
Worked: (optional)

Beveling Edge creates huge spikes

Exact steps for others to reproduce the error
Checked attached blend file. Added edge issue to vertex group for easy selection and checking.bug.blend

**System Information** Win 8 64, 2x MSI 780 Lightning **Blender Version** Broken: (example: 2.70.5, 7660218, see splash screen)![Untitled-1.png](https://archive.blender.org/developer/F87933/Untitled-1.png) Worked: (optional) **Beveling Edge creates huge spikes** **Exact steps for others to reproduce the error** Checked attached blend file. Added edge issue to vertex group for easy selection and checking.[bug.blend](https://archive.blender.org/developer/F87932/bug.blend)

Vlad Mafteiu Scai commented

2014-05-08 21:28:08 +02:00

Changed status to: 'Open'

Vlad Mafteiu Scai commented

2014-05-08 21:28:08 +02:00

Added subscriber: @00Ghz

Howard Trickey was assigned by Bastien Montagne

2014-05-10 08:36:34 +02:00

Bastien Montagne commented

2014-05-10 08:36:34 +02:00

Added subscriber: @mont29

Voyager Voyager commented

2014-06-01 12:51:26 +02:00

Added subscriber: @voyagercgi

Voyager Voyager commented

2014-06-01 12:51:26 +02:00

Percentage amount type works fine and other fails.

marc dion commented

2014-10-03 14:09:12 +02:00

Added subscriber: @MarcClintDion

marc dion commented

2014-10-03 14:09:12 +02:00

I've seen this many times. I've tried baking models when this is happening and didn't notice it right away. It shows up in the baked texture as torn triangles.

If I remember correctly, this always goes away for me when I set the number of segments to 1. Unfortunately, I still don't see the pattern behind what types of geometry are causing this.

Oh and, please pass this around. Reporting Bugs in Blender from Sebastian König http://vimeo.com/75649649

I've seen this many times. I've tried baking models when this is happening and didn't notice it right away. It shows up in the baked texture as torn triangles. If I remember correctly, this always goes away for me when I set the number of segments to 1. Unfortunately, I still don't see the pattern behind what types of geometry are causing this. Oh and, please pass this around. Reporting Bugs in Blender from Sebastian König http://vimeo.com/75649649

marc dion commented

2014-10-03 17:10:08 +02:00

I have just found a situation that reproduces this.

bevelTear.blend

The cylinder is default scale and when I apply the modifier, that long section that is created by the bevel modifier gives the object size as 12144.138 units along the y-axis and 3686.569 along the x-axis.

I have just found a situation that reproduces this. ![2.png](https://archive.blender.org/developer/F114412/2.png) ![1.png](https://archive.blender.org/developer/F114413/1.png) [bevelTear.blend](https://archive.blender.org/developer/F114419/bevelTear.blend) The cylinder is default scale and when I apply the modifier, that long section that is created by the bevel modifier gives the object size as 12144.138 units along the y-axis and 3686.569 along the x-axis.

Julian Eisel commented

2015-02-23 21:29:06 +01:00

Added subscribers: @howardt, @JulianEisel

Julian Eisel commented

2015-02-23 21:29:06 +01:00

Any news on this @howardt?

Howard Trickey commented

2015-02-23 22:05:42 +01:00

I am on vacation now. Will look at this again when I get back, in a couple of days.

Howard Trickey commented

2015-03-17 13:54:53 +01:00

This is similar to bug #39486 where the "adjustment pass" to try to equalize bevel widths keeps accumulating a width increment. Here is a simplified file from the one in this bug report, that still exhibits the problem (even with a bevel amount of .0005).
adjust_error.blend
I'm stuck with the same choices I enumerated in that other bug: either add annoying "do not adjust" workaround flag, or figure out a better adjustment algorithm that doesn't cause this accumulation of increments. I'll try harder to think of the latter but for now this bug remains pending.

This is similar to bug #39486 where the "adjustment pass" to try to equalize bevel widths keeps accumulating a width increment. Here is a simplified file from the one in this bug report, that still exhibits the problem (even with a bevel amount of .0005). [adjust_error.blend](https://archive.blender.org/developer/F152366/adjust_error.blend) I'm stuck with the same choices I enumerated in that other bug: either add annoying "do not adjust" workaround flag, or figure out a better adjustment algorithm that doesn't cause this accumulation of increments. I'll try harder to think of the latter but for now this bug remains pending.

Julian Eisel commented

2015-03-19 22:54:41 +01:00

@howardt, looks like the bugs can be merged as they likely have the same root?

Voyager Voyager commented

2015-03-20 12:37:16 +01:00

Removed subscriber: @voyagercgi

Howard Trickey commented

2015-03-20 12:49:46 +01:00

Closed as duplicate of #39486

Howard Trickey closed this issue

2015-03-20 12:49:46 +01:00

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Bevel Bug #40100