2D line display is broken #68880

New Issue

Steve Warner · 2019-08-20T18:29:35+02:00

Steve Warner commented

2019-08-20 18:29:35 +02:00

System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.86

Blender Version
Broken: version: 2.81 (sub 2), branch: master, commit date: 2019-08-20 07:45, hash: f2cab8267f
Worked: (optional) 2.80 official release

Short description of error
The 2D line display (i.e. CAD curves that have been converted to meshes) is broken in 2.81. See the attached image. The left window shows what the object looks like in 2.80. The right shows what the same object looks like when loaded into 2.81.

Exact steps for others to reproduce the error
I can't provide the CAD file but in my case, I have an object in 2.8 that was imported from a DXF object. It looks fine in 2.8. I save the object and load it into 2.81 and the image attached is what I see.

**System Information** Operating system: Windows-10-10.0.17134 64 Bits Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.86 **Blender Version** Broken: version: 2.81 (sub 2), branch: master, commit date: 2019-08-20 07:45, hash: `f2cab8267f` Worked: (optional) 2.80 official release **Short description of error** The 2D line display (i.e. CAD curves that have been converted to meshes) is broken in 2.81. See the attached image. The left window shows what the object looks like in 2.80. The right shows what the same object looks like when loaded into 2.81. **Exact steps for others to reproduce the error** I can't provide the CAD file but in my case, I have an object in 2.8 that was imported from a DXF object. It looks fine in 2.8. I save the object and load it into 2.81 and the image attached is what I see. ![Line Display error.jpg](https://archive.blender.org/developer/F7675331/Line_Display_error.jpg)

Steve Warner commented

2019-08-20 18:29:35 +02:00

Added subscriber: @stevewarner

Bastien Montagne commented

2019-08-20 19:26:34 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2019-08-20 19:26:34 +02:00

Please follow our submission template and guidelines, also read these tips about bug reports, and make a complete, valid bug report, with required info, precise description of the issue (only ONE issue per report!), precise steps to reproduce it, small and simple .blend and/or other files to do so if needed, etc.

If you cannot share the original file, it should be possible to either 'destroy' it to a few lines only, while still showing the issue, or to generate a dummy demo one…

Please follow our [submission template and guidelines](https:*developer.blender.org/maniphest/task/edit/form/1/), also read [these tips about bug reports](https:*wiki.blender.org/wiki/Process/Bug_Reports), and make a complete, valid bug report, with required info, ***precise description of the issue*** (only ONE issue per report!), precise steps to reproduce it, **small and simple** .blend and/or other files to do so if needed, etc. If you cannot share the original file, it should be possible to either 'destroy' it to a few lines only, while still showing the issue, or to generate a dummy demo one…

Steve Warner commented

2019-08-20 21:47:12 +02:00

I tried to simplify the object but the simplified object loads into 2.81 without a problem. That said, I'm attaching the full version. Here are the steps to reproduce.

Load the attached object into Blender 2.80 official release.
Keep Blender 2.80 open.
Open Blender 2.81 beta.
Load the attached object.
Compare the object in 2.80 and 2.81. You will see missing pieces in 2.81.

The takeaway here is that something changed in 2.81 that is now affecting complex meshes. Cutting out a small part of this model in 2.80 and loading that into 2.81 will not allow you to reproduce the error. This indicates that this is a bug that won't show up in simple situations. It will only show up in real-world situations where users are dealing with complex objects.

CAD_Elevation.blend

I tried to simplify the object but the simplified object loads into 2.81 without a problem. That said, I'm attaching the full version. Here are the steps to reproduce. 1. Load the attached object into Blender 2.80 official release. 2. Keep Blender 2.80 open. 3. Open Blender 2.81 beta. 4. Load the attached object. 5. Compare the object in 2.80 and 2.81. You will see missing pieces in 2.81. The takeaway here is that something changed in 2.81 that is now affecting complex meshes. Cutting out a small part of this model in 2.80 and loading that into 2.81 will not allow you to reproduce the error. This indicates that this is a bug that won't show up in simple situations. It will only show up in real-world situations where users are dealing with complex objects. [CAD_Elevation.blend](https://archive.blender.org/developer/F7675849/CAD_Elevation.blend)

Clément Foucault was assigned by Bastien Montagne

2019-08-21 12:07:45 +02:00

Bastien Montagne commented

2019-08-21 12:07:45 +02:00

Added subscribers: @fclem, @Jeroen-Bakker

Bastien Montagne commented

2019-08-21 12:07:45 +02:00

Confirmed, in Edit mode the vertices remain visible, but part of the edges are not drawing anymore... No idea why, @fclem mind having a look? that is probably more in @Jeroen-Bakker area, but since he is not available currently...

blender-admin commented

2019-08-21 14:47:41 +02:00

This issue was referenced by 8a11e70252

This issue was referenced by 8a11e702525e3df9d5602045bf905f314cd7abbd

Clément Foucault commented

2019-08-21 14:48:14 +02:00

Changed status from 'Open' to: 'Resolved'

Clément Foucault closed this issue

2019-08-21 14:48:14 +02:00

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2D line display is broken #68880