2.77.1 Bevel modifier regression #48996

New Issue

David Black · 2016-08-01T18:29:10+02:00

David Black commented

2016-08-01 18:29:10 +02:00

OS tested:
Ubuntu MATE x64
Windows 7 x64

Hardware tested:
Intel HD 3000
NVIDIA GTX580m

Works in:
2.77a

Broken in:
2.77.1 (a3ce64b)

Opening attached blend you'll notice a bevel modifier display artefact. Not restricted to Viewport, also renders in Cycles. Slightly changing bevel settings causes artefact to be either concave or convex.
2.77.1 Bevel issue.blend

2.77.1 (a3ce64b)

2.77a

Could this regression also be causing textured Viewport issue seen in below screen captures?

2.77.1 (a3ce64b) Solid Viewport

2.77.1 (a3ce64b) Textured Viewport

Compare 2.77a Textured Viewport

This (shading and jagged edges) happens with complex scenes while switching between solid and textured Viewport. Unable to share blend seen in above screen captures, trying to create a blend that constantly reproduces this 2.77.1 shading issue.

Thanks

**OS tested:** Ubuntu MATE x64 Windows 7 x64 **Hardware tested:** Intel HD 3000 NVIDIA GTX580m **Works in:** 2.77a **Broken in:** 2.77.1 (a3ce64b) Opening attached blend you'll notice a bevel modifier display artefact. Not restricted to Viewport, also renders in Cycles. Slightly changing bevel settings causes artefact to be either concave or convex. [2.77.1 Bevel issue.blend](https://archive.blender.org/developer/F330993/2.77.1_Bevel_issue.blend) 2.77.1 (a3ce64b) ![2.77.1.png](https://archive.blender.org/developer/F330994/2.77.1.png) 2.77a ![2.77a.png](https://archive.blender.org/developer/F330997/2.77a.png) ___ Could this regression also be causing textured Viewport issue seen in below screen captures? 2.77.1 (a3ce64b) Solid Viewport ![2.77.1 solid.png](https://archive.blender.org/developer/F331000/2.77.1_solid.png) 2.77.1 (a3ce64b) Textured Viewport ![2.77.1 textured.png](https://archive.blender.org/developer/F331003/2.77.1_textured.png) Compare 2.77a Textured Viewport ![2.77a textured.png](https://archive.blender.org/developer/F331006/2.77a_textured.png) This (shading and jagged edges) happens with complex scenes while switching between solid and textured Viewport. Unable to share blend seen in above screen captures, trying to create a blend that constantly reproduces this 2.77.1 shading issue. Thanks

David Black commented

2016-08-01 18:29:10 +02:00

Changed status to: 'Open'

David Black commented

2016-08-01 18:29:10 +02:00

Added subscriber: @david_black

Sergey Sharybin commented

2016-08-02 09:49:32 +02:00

Added subscriber: @Sergey

Howard Trickey was assigned by Sergey Sharybin

2016-08-02 09:49:32 +02:00

Sergey Sharybin commented

2016-08-02 09:49:32 +02:00

Howard, is it the same roots as other reports assigned to you? Mind having a look anyway? :) Thanks!

Howard Trickey commented

2016-08-02 13:46:51 +02:00

This seems to be a new bevel problem. I will try to fix it soon.

David Black commented

2016-08-02 16:24:22 +02:00

In case helpful, after further experimentation, found the 2.77.1 shading & jagged edges issue (second set of screen captures) is unrelated to Bevel modifier, this issue seems connected with textured viewport shading changes made since 2.77a?

This issue only happens while:

Using textured viewport in 2.77.1 (2.77a is unaffected)
Simple objects set to smooth shading
issue appears and disappears while moving around the viewport in this complex scene

Have changes been made since 2.77a to textured viewport drawing routines? Tried skimming cvs archives, but (so far) not found anything.
Still trying to create a blend file that I'm able to share highlighting this issue.

In closing:
Thank you Sergey and Howard for taking time to look at the Bevel bug report.

In case helpful, after further experimentation, found the 2.77.1 shading & jagged edges issue (second set of screen captures) is unrelated to Bevel modifier, this issue seems connected with textured viewport shading changes made since 2.77a? **This issue only happens while:** * Using textured viewport in 2.77.1 (2.77a is unaffected) * Simple objects set to smooth shading * issue appears and disappears while moving around the viewport in this complex scene Have changes been made since 2.77a to textured viewport drawing routines? Tried skimming cvs archives, but (so far) not found anything. Still trying to create a blend file that I'm able to share highlighting this issue. In closing: Thank you Sergey and Howard for taking time to look at the Bevel bug report.

Howard Trickey commented

2016-08-02 16:36:49 +02:00

Unrelated to the strange shading, there is definitely something strange going on with bevel here. Maybe some strange geometry (though I did check for doubles, and there are no doubled vertices at least). I need to find some time to investigate further. Unfortunately, I don't have time right at this instant.

David Black commented

2016-08-02 18:23:36 +02:00

Created a small (file size) video highlighting second issue.
Textured viewport shading issue.mp4

Seems this 2.77.1 textured viewport shading issue should be split into another bug report (except may be rejected without a blend file?).

Thanks Howard,
Did check for abnormal geometry (including doubles) before submitting the bevel issue blend file, but was unable to find any. No problem about time, take as long as you need my friend.

Hope the rest of your day goes well, and is productive.

Created a small (file size) video highlighting second issue. [Textured viewport shading issue.mp4](https://archive.blender.org/developer/F331465/Textured_viewport_shading_issue.mp4) Seems this 2.77.1 textured viewport shading issue should be split into another bug report (except may be rejected without a blend file?). ___ Thanks Howard, Did check for abnormal geometry (including doubles) before submitting the bevel issue blend file, but was unable to find any. No problem about time, take as long as you need my friend. Hope the rest of your day goes well, and is productive.

David Black commented

2016-08-02 18:54:14 +02:00

In case helpful for Howard,

Short video showing how bevel issue is created
Recreatig bevel issue blend.mp4

Default cube
Two loop cuts added to each side
Bevel modifier settings used

In case helpful for Howard, Short video showing how bevel issue is created [Recreatig bevel issue blend.mp4](https://archive.blender.org/developer/F331470/Recreatig_bevel_issue_blend.mp4) * Default cube * Two loop cuts added to each side * Bevel modifier settings used

David Black commented

2016-08-09 15:52:31 +02:00

Textured viewport smooth shading issue now has its own bug report, complete with blend file.
https://developer.blender.org/T49057

Textured viewport smooth shading issue now has its own bug report, complete with blend file. https://developer.blender.org/T49057

blender-admin commented

2017-05-28 20:02:56 +02:00

This issue was referenced by 9ba7805a3b

This issue was referenced by 9ba7805a3bc4cae1ec9fcdcfbc8b30fb84a3685c

Howard Trickey commented

2017-05-28 20:15:47 +02:00

Changed status from 'Open' to: 'Resolved'

Howard Trickey closed this issue

2017-05-28 20:15:47 +02:00

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2.77.1 Bevel modifier regression #48996