NaN in object matrix of instanced objects #76268

New Issue

Tyler · 2020-04-30T15:31:18+02:00

Tyler commented

2020-04-30 15:31:18 +02:00

System Information
Ryzen 7 3800x
31.9 GB Ram
Operating system: Windows 10
Graphics card: Nvidia 2060 6GB Ram

I tested the same scene out on my other box and the problem happened. Both machines are running RTX 2060s. One is a Intel box and the other AMD.

Blender Version 2.81 and 2.82a
Worked: Nothing has worked

Error
YouTube link to render glitches: https://youtu.be/e1ScHjBANLk

Whenever I start a render, around frame 58 the sun shadows just disappear.
If I close the scene and open it back up and render the frame where the shadows disappear, it will render fine. But after about 50 or so frames the shadows disappear again.
It works fine in viewport.

note
I deleted the volume light box with just a 1000 floating sprite boxes for the dust inside the garage. After that, the issue went away all together. I then added the volume box back and the problem happened again. It must have something to do with volume lighting. The grass outside is over 12k clones using a particle hair so it has something to do with volume lighting and particles inside a object.

Files
Blender_Bug.zip
It was 12 GB, removed extra elements and brought it down to this.
Around frame 60 if you render the animation 1-300 the shadow will disappear. Escape the render… The viewport will continue to display the shadow. But after the shadow disappears during the render, and without closing and reopening Blender, whenever you render that frame, the shadow “sun light” is absent.

**System Information** Ryzen 7 3800x 31.9 GB Ram Operating system: Windows 10 Graphics card: Nvidia 2060 6GB Ram I tested the same scene out on my other box and the problem happened. Both machines are running RTX 2060s. One is a Intel box and the other AMD. **Blender Version** 2.81 and 2.82a Worked: Nothing has worked **Error** YouTube link to render glitches: https://youtu.be/e1ScHjBANLk Whenever I start a render, around frame 58 the sun shadows just disappear. If I close the scene and open it back up and render the frame where the shadows disappear, it will render fine. But after about 50 or so frames the shadows disappear again. It works fine in viewport. **note** I deleted the volume light box with just a 1000 floating sprite boxes for the dust inside the garage. After that, the issue went away all together. I then added the volume box back and the problem happened again. It must have something to do with volume lighting. The grass outside is over 12k clones using a particle hair so it has something to do with volume lighting and particles inside a object. **Files** [Blender_Bug.zip](https://archive.blender.org/developer/F8506090/Blender_Bug.zip) It was 12 GB, removed extra elements and brought it down to this. Around frame 60 if you render the animation 1-300 the shadow will disappear. Escape the render… The viewport will continue to display the shadow. But after the shadow disappears during the render, and without closing and reopening Blender, whenever you render that frame, the shadow “sun light” is absent. ![test-test_0059.jpg](https://archive.blender.org/developer/F8506147/test-test_0059.jpg) ![test-test_0060.jpg](https://archive.blender.org/developer/F8506151/test-test_0060.jpg)

Tyler commented

2020-04-30 15:31:18 +02:00

Added subscriber: @TPVUSA

Tyler commented

2020-04-30 15:44:50 +02:00

This is what Blender is rendering I found even more bugs. https://www.youtube.com/watch?v=e1ScHjBANLk

Tyler changed title from ~~EEVEE Shadows disaperaing for no goog reason~~ to EEVEE Shadows disappearing for no good reason

2020-04-30 15:51:02 +02:00

Ankit Meel commented

2020-04-30 18:34:08 +02:00

Added subscriber: @ankitm

Ankit Meel commented

2020-04-30 18:34:08 +02:00

The scene is 12 GB in size with maps and all, will need to work out a delivery method.

One should reduce the scene objects just above till it doesn't happen anymore.

> The scene is 12 GB in size with maps and all, will need to work out a delivery method. One should reduce the scene objects just above till it doesn't happen anymore.

Tyler commented

2020-04-30 20:35:27 +02:00

In #76268#921032, @ankitm wrote:

The scene is 12 GB in size with maps and all, will need to work out a delivery method.

One should reduce the scene objects just above till it doesn't happen anymore.

I deleted objects and scaled all the maps down till the scene was only consuming 4GB of memory same result shadow just disappears randomly.

> In #76268#921032, @ankitm wrote: >> The scene is 12 GB in size with maps and all, will need to work out a delivery method. > One should reduce the scene objects just above till it doesn't happen anymore. I deleted objects and scaled all the maps down till the scene was only consuming 4GB of memory same result shadow just disappears randomly.

Tyler commented

2020-05-01 00:46:21 +02:00

Figured it out, It has nothing to do with file size or object complexity. I deleted the volume light box with just a 1000 floating sprite boxes for the dust inside the garage. After that, the issue went away all together. I then added the volume box back and the problem happened again. It must have something to do with volume lighting. The grass outside is over 12k clones using a particle hair so it has something to do with volume lighting and particles inside a object. If Blender is really serious about winning over Max and Maya users, then get back to me I can send the scene via a zip file. I tested the same scene out on my other box and the problem happened. Both machines are running RTX 2060s. One is a Intel box and the other AMD.

Ankit Meel commented

2020-05-01 08:08:04 +02:00

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

Ankit Meel commented

2020-05-01 08:08:04 +02:00

then get back to me I can send the scene via a zip file.

It was asked in the form itself. Please remove extraneous elements which totally do not contribute to the bug. A better approach would be to bring problematic objects only to a new blend file and upload the zip.

What's the deal with no pause or stop rendering on an animation?

I think esc should work ? If not, I just close the render window and I'm back to the main.

> then get back to me I can send the scene via a zip file. It was asked in the form itself. Please remove extraneous elements which totally do not contribute to the bug. A better approach would be to bring problematic objects only to a new blend file and upload the zip. > What's the deal with no pause or stop rendering on an animation? I think esc should work ? If not, I just close the render window and I'm back to the main.

Tyler commented

2020-05-01 15:53:06 +02:00

In #76268#921372, @ankitm wrote:

then get back to me I can send the scene via a zip file.

It was asked in the form itself. Please remove extraneous elements which totally do not contribute to the bug. A better approach would be to bring problematic objects only to a new blend file and upload the zip.

What's the deal with no pause or stop rendering on an animation?

I think esc should work ? If not, I just close the render window and I'm back to the main.

Roger that will do

> In #76268#921372, @ankitm wrote: >> then get back to me I can send the scene via a zip file. > It was asked in the form itself. Please remove extraneous elements which totally do not contribute to the bug. A better approach would be to bring problematic objects only to a new blend file and upload the zip. > >> What's the deal with no pause or stop rendering on an animation? > I think esc should work ? If not, I just close the render window and I'm back to the main. Roger that will do

Tyler commented

2020-05-01 18:27:15 +02:00

Blender_Bug.zip

Around frame 60 if you render the animation 1-300 the shadow will disappear. Escape the render… The viewport will continue to display the shadow. But after the shadow disappears during the render and without closing and reopening Blender whenever you render a frame the shadow “sun light” is absent.

[Blender_Bug.zip](https://archive.blender.org/developer/F8506090/Blender_Bug.zip) ![test-test_0059.jpg](https://archive.blender.org/developer/F8506147/test-test_0059.jpg) ![test-test_0060.jpg](https://archive.blender.org/developer/F8506151/test-test_0060.jpg) Around frame 60 if you render the animation 1-300 the shadow will disappear. Escape the render… The viewport will continue to display the shadow. But after the shadow disappears during the render and without closing and reopening Blender whenever you render a frame the shadow “sun light” is absent.

Ankit Meel changed title from ~~EEVEE Shadows disappearing for no good reason~~ to EEVEE Render: Shadows disappearing every 50 frames, viewport works fine.

2020-05-01 18:48:48 +02:00

Ankit Meel commented

2020-05-01 18:48:48 +02:00

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

Tyler commented

2020-05-01 21:44:09 +02:00

It’s not every 50 frames sometimes its 3 when you are closer to the volume lighting if you close blender and start it up again from the frame the shadow disappeared from it will maybe render 2 or 5 frames before losing the shadow. Its random but a bug never the less.

Ankit Meel changed title from ~~EEVEE Render: Shadows disappearing every 50 frames, viewport works fine.~~ to EEVEE Render: Shadows disappearing in some frames, viewport works fine.

2020-05-02 09:42:42 +02:00

Clément Foucault commented

2020-06-30 02:49:44 +02:00

Added subscriber: @fclem

Clément Foucault commented

2020-06-30 02:49:44 +02:00

The issue happens because the instanced object (OBSphere.001) is wrongly evaluated and has NaNs in place of its obmat. Leading to an infinitly large cascade.

So this is a particle system issue.

The bug disapear if the number of particle changes (I guess the cache is cleared) so I don't know if that's because of the cached data or if the simulation of this particular setup is causing the NaNs.

Here is a much simpler file to test with.
Shadow-SUN_Volume-bug1.blend

The issue happens because the instanced object (`OBSphere.001`) is wrongly evaluated and has NaNs in place of its `obmat`. Leading to an infinitly large cascade. So this is a particle system issue. The bug disapear if the number of particle changes (I guess the cache is cleared) so I don't know if that's because of the cached data or if the simulation of this particular setup is causing the NaNs. Here is a much simpler file to test with. [Shadow-SUN_Volume-bug1.blend](https://archive.blender.org/developer/F8654473/Shadow-SUN_Volume-bug1.blend)

Clément Foucault changed title from ~~EEVEE Render: Shadows disappearing in some frames, viewport works fine.~~ to NaN in object matrix of instanced objects

2020-06-30 02:50:21 +02:00

Philipp Oeser removed the

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NaN in object matrix of instanced objects #76268