Viewport Broken - Might be related to Particles Conversion to Mesh #70579

New Issue

Ahmad Bilal · 2019-10-06T04:30:27+02:00

Ahmad Bilal commented

2019-10-06 04:30:27 +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 14), branch: master, commit date: 2019-10-05 20:51, hash: 4707f1982d
Worked: (optional)

Short description of error
The viewport is broken for me while applying a simple displacement modifier on my mesh, in the provided file, made on OCT 5 build, just few minutes ago. I have to infinitely zoom out/in .. yet it seems I'm still inside the mesh still.

Exact steps for others to reproduce the error

Created a simple cube, made a new collection and added a few cubes, cones and spheres (very simple meshes .. low poly) .. used the particles system to apply 1000 total of them on the first cube.
Converted particles to mesh
Applied Subsurface modifier to give some geometry. Then a Displacement modifier with about .300 strength only.
Viewport Broken! In the sense that I can't zoom out even after scrolling back a lot. Even hiding the displacement modifier in viewport, doesn't seem to fix it 'every time'. It works sometimes, and sometimes it doesn't.

Additional Info: The last build I downloaded a few days ago was: blender-2.81-11768d1c9f43-windows64 (Current Build is blender-2.81-4707f1982ddb-windows64) .. and it 100% had its 'Convert Particles to Mesh' mechanism broken. I didn't report that because I frankly didn't have time.. and I thought someone else would report and it would get fixed soon. I had checked it with comparison to 2.8 perfectly.. and 2.8 was working perfectly fine.

Also note, that when you initially convert to mesh, nothing would seem wrong at first. But when you 'JOIN' together the long list of seperate particles .. and then try to do further operations on it.. like decimate or displace .. then viewport would go haywire. Lot of random stuff happened.

In the current build, I did not see that happen exactly (needs further testing) .. but initial observations is that the current build is more stable. But I'm pretty sure, this viewport getting broken is related to Particle Conversion to Mesh

{F7792283}

**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 14), branch: master, commit date: 2019-10-05 20:51, hash: `4707f1982d` Worked: (optional) **Short description of error** The viewport is broken for me while applying a simple displacement modifier on my mesh, in the provided file, made on OCT 5 build, just few minutes ago. I have to infinitely zoom out/in .. yet it seems I'm still inside the mesh still. **Exact steps for others to reproduce the error** 1. Created a simple cube, made a new collection and added a few cubes, cones and spheres (very simple meshes .. low poly) .. used the particles system to apply 1000 total of them on the first cube. 2. Converted particles to mesh 3. Applied Subsurface modifier to give some geometry. Then a Displacement modifier with about .300 strength only. 4. Viewport Broken! In the sense that I can't zoom out even after scrolling back a lot. Even hiding the displacement modifier in viewport, doesn't seem to fix it 'every time'. It works sometimes, and sometimes it doesn't. Additional Info: The last build I downloaded a few days ago was: **blender-2.81-11768d1c9f43-windows64** (Current Build is blender-2.81-4707f1982ddb-windows64) .. and it 100% had its 'Convert Particles to Mesh' mechanism broken. I didn't report that because I frankly didn't have time.. and I thought someone else would report and it would get fixed soon. I had checked it with comparison to 2.8 perfectly.. and 2.8 was working perfectly fine. Also note, that when you initially convert to mesh, nothing would seem wrong at first. But when you 'JOIN' together the long list of seperate particles .. and then try to do further operations on it.. like decimate or displace .. then viewport would go haywire. Lot of random stuff happened. In the current build, I did not see that happen exactly (needs further testing) .. but initial observations is that the current build is more stable. But I'm pretty sure, this viewport getting broken is related to Particle Conversion to Mesh **{[F7792283](https://archive.blender.org/developer/F7792283/Bug6OCT.blend)}**

Ahmad Bilal commented

2019-10-06 04:30:27 +02:00

Added subscriber: @SomeAB

Marcin Twarowski commented

2019-10-07 10:44:48 +02:00

Added subscriber: @MarcinTwarowski

Marcin Twarowski commented

2019-10-07 10:44:48 +02:00

Texture for the displacement is Musgrave, but its 'Type' is not specified:

If you change it to any type, e.g. Multifractal, the displacement works as expected.

Texture for the displacement is Musgrave, but its 'Type' is not specified: ![obraz.png](https://archive.blender.org/developer/F7794386/obraz.png) If you change it to any type, e.g. Multifractal, the displacement works as expected.

Philipp Oeser commented

2019-10-07 11:56:35 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-10-07 11:56:35 +02:00

Thx @MarcinTwarowski for checking, I am also getting:

WARN (bpy.rna): /blender/source/blender/python/intern/bpy_rna.c:1470 pyrna_enum_to_py: current value '5' matches no enum in 'MusgraveTexture', 'Texture', 'musgrave_type'

Question is: how did we get here? [I cannot reproduce with the steps provided...]
And since the file that is reported here is already in the "broken" state, we would need a file with clear reproduction steps [like everything is set up, explaining the remaining steps that lead to the issue (for example you also did not mention how the displace modifier was set up to Musgrave... just change from Image to Musgrave?)]

Thx @MarcinTwarowski for checking, I am also getting: `WARN (bpy.rna): /blender/source/blender/python/intern/bpy_rna.c:1470 pyrna_enum_to_py: current value '5' matches no enum in 'MusgraveTexture', 'Texture', 'musgrave_type'` Question is: how did we get here? [I cannot reproduce with the steps provided...] And since the file that is reported here is already in the "broken" state, we would need a file with clear reproduction steps [like everything is set up, explaining the remaining steps that lead to the issue (for example you also did not mention how the displace modifier was set up to Musgrave... just change from Image to Musgrave?)]

Ahmad Bilal commented

2019-10-07 19:24:34 +02:00

@lichtwerk : Is that a question for me or Marcin? In case it is for me:

As I have said, I'm pretty sure this was caused by the convert-to-mesh operation beforehand .. and joining the resulting different parts. Then during further operations I noticed unnatural behavior (inconsistent). Atleast on the previous build I mentioned. Otherwise using the displace modifier on its own only .. has no visible issues.
Preparing a second file might be troublesome to do. But I will try.

Frankly I haven't been able to prepare a file for a previous bug I reported earlier as well .. there is holiday here tomorrow, I will see what I can do. Thanks.

@lichtwerk : Is that a question for me or Marcin? In case it is for me: 1. As I have said, I'm pretty sure this was caused by the convert-to-mesh operation beforehand .. and joining the resulting different parts. Then during further operations I noticed unnatural behavior (inconsistent). Atleast on the previous build I mentioned. Otherwise using the displace modifier on its own only .. has no visible issues. 2. Preparing a second file might be troublesome to do. But I will try. Frankly I haven't been able to prepare a file for a previous bug I reported earlier as well .. there is holiday here tomorrow, I will see what I can do. Thanks.

Ahmad Bilal commented

2019-10-08 00:47:00 +02:00

Yes, I have just checked. Atleast the Particles conversion to Mesh is broken in the current build. Please see the attached video.

Also note: If the particles are converted to mesh in the current 2.81 build .. and file saved after that, then opening in 2.8 the same file will give the same error on joining the objects. However.. not converting, and just saving before that would not give any issues in 2.8.
Though I'm not sure.. if the viewport crashed on me earlier because of that. But that seems to be the only logical explanation to me .. based on what I was doing when I got the bug.

2019-10-08_04-09-52.flv

Edit: a correction .. I gesture in that video towards the end.. that particles applied on that plane dissappeared .. that is my mistake.. the reason they dissappeared is because the 3 items got merged into the leaf .. and not into the flower (which the particles system was using).

Yes, I have just checked. Atleast the Particles conversion to Mesh is broken in the current build. Please see the attached video. - Also note: If the particles are converted to mesh in the current 2.81 build .. and file saved after that, then opening in 2.8 the same file will give the same error on joining the objects. However.. not converting, and just saving before that would not give any issues in 2.8. - Though I'm not sure.. if the viewport crashed on me earlier because of that. But that seems to be the only logical explanation to me .. based on what I was doing when I got the bug. [2019-10-08_04-09-52.flv](https://archive.blender.org/developer/F7795628/2019-10-08_04-09-52.flv) Edit: a correction .. I gesture in that video towards the end.. that particles applied on that plane dissappeared .. that is my mistake.. the reason they dissappeared is because the 3 items got merged into the leaf .. and not into the flower (which the particles system was using).

Richard Antalik commented

2020-01-14 13:34:06 +01:00

Added subscriber: @iss

Richard Antalik commented

2020-01-14 13:34:06 +01:00

Changed status from 'Needs Developer To Reproduce' to: 'Needs User Info'

Richard Antalik commented

2020-01-14 13:34:06 +01:00

@SomeAB I tried to reproduce issues based on report - join meshes apply to particle system and add modifiers. I haven't found any issues there.

Do you still have issues with latest build? https://builder.blender.org/download/

As for last comment, can you provide blend file, or re-test?

@SomeAB I tried to reproduce issues based on report - join meshes apply to particle system and add modifiers. I haven't found any issues there. Do you still have issues with latest build? https://builder.blender.org/download/ As for last comment, can you provide blend file, or re-test?

Richard Antalik commented

2020-01-23 01:06:57 +01:00

Changed status from 'Needs User Info' to: 'Archived'

Richard Antalik closed this issue

2020-01-23 01:06:57 +01:00

Richard Antalik self-assigned this 2020-01-23 01:06:57 +01:00

Richard Antalik commented

2020-01-23 01:06:57 +01:00

Since last asking for information it has been 7 or more days, due to the policy of our bug tracker we will have to close the report.

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Viewport Broken - Might be related to Particles Conversion to Mesh #70579