Blender Crashes while using Quadriflow while preserving curvature #69866

New Issue

Ahmad Bilal · 2019-09-14T03:41:34+02:00

Ahmad Bilal commented

2019-09-14 03:41:34 +02:00

System Information
Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: Radeon RX Vega ATI Technologies Inc. 4.5.13559 Core Profile Context 26.20.12001.7006

Blender Version
Broken: version: 2.81 (sub 11), branch: master, commit date: 2019-09-13 15:37, hash: 92736a7b75
Worked: (optional)

Quadriflow works just fine in most other modes (haven't really 100% nitpicked it yet) .. but I noticed that blender crashes way more than acceptable no of times if I use the setting 'Use Mesh Curvature' together with Mesh Boundary and Preserve Sharp settings. Sometimes it works okay, but most of the times it just crashes around 30%-40% remesh completion progress.

Turning off 'Use Mesh Curvature' brings about stability.

**System Information** Operating system: Windows-10-10.0.17763 64 Bits Graphics card: Radeon RX Vega ATI Technologies Inc. 4.5.13559 Core Profile Context 26.20.12001.7006 **Blender Version** Broken: version: 2.81 (sub 11), branch: master, commit date: 2019-09-13 15:37, hash: `92736a7b75` Worked: (optional) Quadriflow works just fine in most other modes (haven't really 100% nitpicked it yet) .. but I noticed that blender crashes way more than acceptable no of times if I use the setting 'Use Mesh Curvature' together with Mesh Boundary and Preserve Sharp settings. Sometimes it works okay, but most of the times it just crashes around 30%-40% remesh completion progress. Turning off 'Use Mesh Curvature' brings about stability.

Ahmad Bilal commented

2019-09-14 03:41:34 +02:00

Added subscriber: @SomeAB

Sebastian Parborg commented

2019-09-14 17:55:25 +02:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2019-09-14 17:55:25 +02:00

Need steps to reproduce this. Just stating that it is a problem with no reproduction steps is not helpful.

Ahmad Bilal commented

2019-09-16 07:12:04 +02:00

I thought what I wrote should have been clear enough. But here anyway:

Take a mesh above 10k vertices (I noticed this crash doesn't happen on low poly models)
Choose to Quadriflow Remesh in any mode (I use Edge mode mostly)
Select the checkbox for 'Preserve Sharp' + 'Preserve Mesh Boundary' and (lastly and most importantly) 'Use Mesh Curvature'
Press 'Ok' to start remeshing process
Crash

I thought what I wrote should have been clear enough. But here anyway: 1. Take a mesh above 10k vertices (I noticed this crash doesn't happen on low poly models) 2. Choose to Quadriflow Remesh in any mode (I use Edge mode mostly) 3. Select the checkbox for 'Preserve Sharp' + 'Preserve Mesh Boundary' and (lastly and most importantly) 'Use Mesh Curvature' 4. Press 'Ok' to start remeshing process 5. Crash

Ahmad Bilal commented

2019-09-18 02:52:47 +02:00

just checked the latest build .. (blender-2.81-9609840b5ea1-windows64). now there is no crash when 'Use Mesh Curvature' is checked.

But the performance has gone down way down for me. To give you an idea, earlier I had a scene open with 1.8 million tris, and a typical 30K faces model would get remeshed into a similar sized mesh (about 30k also) in under 1 minute while that scene was open (in the build version mentioned in the first post). Now in a clean file, with about450k tris, I can't remesh a 80k faces model model into a similar sized mesh (60k faces) in even 15 minutes!

I'm pretty sure that there is a memory overflow issue somewhere. Since now blender is taking 5 to 6 GB of RAM and still can't remesh that 60k mesh in even 15 minutes.

Let me know, if you need more information from my side.

just checked the latest build .. (blender-2.81-9609840b5ea1-windows64). now there is no crash when 'Use Mesh Curvature' is checked. But the performance has gone down way down for me. To give you an idea, earlier I had a scene open with **1.8 million tris**, and a typical **30K faces model** would get remeshed into a similar sized mesh (about 30k also) in under **1 minute** while that scene was open (in the build version mentioned in the first post). Now in a clean file, with about**450k tris**, I can't remesh a **80k faces model** model into a similar sized mesh (60k faces) in even 15 minutes! I'm pretty sure that there is a memory overflow issue somewhere. Since now blender is taking 5 to 6 GB of RAM and still can't remesh that 60k mesh in even 15 minutes. Let me know, if you need more information from my side.

Ahmad Bilal commented

2019-09-18 03:38:28 +02:00

Dropped back to blender-2.81-92736a7b7592-windows64 .. and though I'm able to complete my remeshing attempts (same 450k tris file) .. it is taking me longer than before (yet still less than latest build) .. about 5-6 minutes.

Edit 1: Yup, it definitely seems that something is going on behind the scene. I made a clean file with only 1 object of 110k faces/218k tris -- > 80k faces. tried to remesh it thrice (once in previous 450k file) .. and even after 20-30 minutes, it doesn't get done (despite of using 6.5GB of RAM) .. and blender crashed each time.

Not only blender, but discord and few mozilla firefox tabs crashed as well.

Edit 2: After spending the whole morning toying with it. I noticed something interesting:

I took my 110k faces model .. voxel remeshed it first (at 0.006 setting) ..
and it became 530k tris
After that I remeshed it using Quadriflow, but this time the edge length was set to 0.012 (instead of 0.01)
The 530k got remeshed into 110k tris/55k faces in less than 30 seconds. and blender memory usage howered around 1GB for most of the time, and peaked at 2.7GB

Edit 3: Day 2, and after a lot more tingling with the settings:

From what I'm seeing, using the setting of edge length = 0.012 works most of the time, while 0.01 breaks things many a times.

Dropped back to blender-2.81-92736a7b7592-windows64 .. and though I'm able to complete my remeshing attempts (same 450k tris file) .. it is taking me longer than before (yet still less than latest build) .. about 5-6 minutes. Edit 1: Yup, it definitely seems that something is going on behind the scene. I made a clean file with only 1 object of 110k faces/218k tris -- > 80k faces. tried to remesh it thrice (once in previous 450k file) .. and even after 20-30 minutes, it doesn't get done (despite of using 6.5GB of RAM) .. and blender crashed each time. Not only blender, but discord and few mozilla firefox tabs crashed as well. Edit 2: After spending the whole morning toying with it. I noticed something interesting: 1) I took my 110k faces model .. voxel remeshed it first (at 0.006 setting) .. 2) and it became 530k tris 3) After that I remeshed it using Quadriflow, but this time the edge length was set to 0.012 (instead of 0.01) 4) The 530k got remeshed into 110k tris/55k faces in less than 30 seconds. and blender memory usage howered around 1GB for most of the time, and peaked at 2.7GB Edit 3: Day 2, and after a lot more tingling with the settings: **From what I'm seeing, using the setting of edge length = 0.012 works most of the time, while 0.01 breaks things many a times.**

Ahmad Bilal commented

2019-09-23 15:33:26 +02:00

@ZedDB any update?

Sebastian Parborg commented

2019-09-23 17:34:34 +02:00

I can't reproduce this issue on my test meshes. So unless you actually provide an example file there is nothing I can do.

Sebastian Parborg commented

2019-09-23 18:22:42 +02:00

Actually, could you see if you still get crashes if you change sound system backend to "Null" in the preferences? It seems like some people get sound crashes when running the operator for some reason.

Sebastian Parborg self-assigned this 2019-09-24 17:03:31 +02:00

Ahmad Bilal commented

2019-09-27 15:40:21 +02:00

Okay, I will test the old version as well as the new version and let you know. And I will also make a minimal demo file for you.