Blender 2.9 external renderer shader node bug #80780

New Issue

Nandeya charles · 2020-09-14T18:45:26+02:00

Nandeya charles commented

2020-09-14 18:45:26 +02:00

System Information
Operating system: windows 10 64 bit
Graphics card: RTX 2060 super

Blender Version
Broken: Blender 2.90 official / but it happen since a while now with older blender version
Worked: reported once here : https://developer.blender.org/T76381

Short description of error

Blender doesn't save animation keyframe input (color/Value ...) in shader node with luxcore render engine.
From the blendluxcore Devs it is a blender issue.

Exact steps for others to reproduce the error

1/ install luxcore render engine from here : https://luxcorerender.org/download/

2/ in blender switch to Luxcore engine

3/ add a shader matte (or any shader)

4/ animate any shader value of your choice.

**System Information** Operating system: windows 10 64 bit Graphics card: RTX 2060 super **Blender Version** Broken: Blender 2.90 official / but it happen since a while now with older blender version Worked: reported once here : https://developer.blender.org/T76381 **Short description of error** Blender doesn't save animation keyframe input (color/Value ...) in shader node with luxcore render engine. From the blendluxcore Devs it is a blender issue. Exact steps for others to reproduce the error 1/ install luxcore render engine from here : https://luxcorerender.org/download/ 2/ in blender switch to Luxcore engine 3/ add a shader matte (or any shader) 4/ animate any shader value of your choice.

Nandeya charles commented

2020-09-14 18:45:26 +02:00

Added subscriber: @sharlybg

Nandeya charles changed title from ~~Blender 2.8 external renderer shader node bug~~ to Blender 2.9 external renderer shader node bug

2020-09-14 18:45:38 +02:00

Juan Gea commented

2020-09-15 17:23:48 +02:00

Added subscriber: @juang3d

Juan Gea commented

2020-09-15 17:23:48 +02:00

This is kind of super important for any third party render engine

Richard Antalik commented

2020-09-16 17:34:48 +02:00

Added subscriber: @iss

Richard Antalik commented

2020-09-16 17:34:48 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Richard Antalik commented

2020-09-16 17:34:48 +02:00

I can confirm, that preview is not updated when scrubbing timeline, Render is updated.

@sharlybg do you have link to ticket in luxcore bugtracker?

I can confirm, that preview is not updated when scrubbing timeline, Render is updated. @sharlybg do you have link to ticket in luxcore bugtracker?

Nandeya charles commented

2020-09-16 22:17:47 +02:00

As it is a blender bug i didn't open a bug issue on Luxcore bug tracker. But just in cases it is needed here is the link to the BlendLuxcore bug tracker : blendluxcore bug tracker

As it is a blender bug i didn't open a bug issue on Luxcore bug tracker. But just in cases it is needed here is the link to the BlendLuxcore bug tracker : [blendluxcore bug tracker ](https://github.com/LuxCoreRender/BlendLuxCore/issues)

Richard Antalik commented

2020-09-17 14:55:53 +02:00

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

Richard Antalik commented

2020-09-17 14:55:53 +02:00

In #80780#1017258, @sharlybg wrote:
As it is a blender bug i didn't open a bug issue on Luxcore bug tracker. But just in cases it is needed here is the link to the BlendLuxcore bug tracker : blendluxcore bug tracker

You said "From the blendluxcore Devs it is a blender issue." So I assumed you reported this and they said it's bug in Blender, I also confirmed this on that basis. It would definitely help if we knew why this is bugh in Blender.

Since I have not triaged this really, we need to have another look. But to triage this issue we need example file that demonstrates the bug. I would assume that the node or tree is not doing something sometimes, but I need to know that exactly. Having example file is best because both of us can test if things are working correctly.

Sorry if I misunderstand something.

> In #80780#1017258, @sharlybg wrote: > As it is a blender bug i didn't open a bug issue on Luxcore bug tracker. But just in cases it is needed here is the link to the BlendLuxcore bug tracker : [blendluxcore bug tracker ](https://github.com/LuxCoreRender/BlendLuxCore/issues) You said "From the blendluxcore Devs it is a blender issue." So I assumed you reported this and they said it's bug in Blender, I also confirmed this on that basis. It would definitely help if we knew why this is bugh in Blender. Since I have not triaged this really, we need to have another look. But to triage this issue we need example file that demonstrates the bug. I would assume that the node or tree is not doing something sometimes, but I need to know that exactly. Having example file is best because both of us can test if things are working correctly. Sorry if I misunderstand something.

Nandeya charles commented

2020-09-17 18:30:46 +02:00

Sorry for late reply. Here is the file :

Test blend.blend

Tried the file in Blender 2.83LTS + Blendluxcore 2.4 official and it work. But Blender 2.83LTS + Blendluxcore 2.5 don't.
will test blender 2.9 official + 2.5 and 2.4 blendluxcore.

Sorry for late reply. Here is the file : [Test blend.blend](https://archive.blender.org/developer/F8892650/Test_blend.blend) Tried the file in Blender 2.83LTS + Blendluxcore 2.4 official and it work. But Blender 2.83LTS + Blendluxcore 2.5 don't. will test blender 2.9 official + 2.5 and 2.4 blendluxcore.

Richard Antalik commented

2020-09-17 18:46:18 +02:00

Thanks for example file, but that is not quite what I meant. This would require us to work not only with Blendr code, but also with Luxcore's. We should not need to use Luxcore to demonstrate this bug if it is bug in Blender.

Nandeya charles commented

2020-09-17 18:46:55 +02:00

Tested with Blender 2.9 + Blendluxcore 2.4 and it work.

Richard Antalik commented

2020-09-17 19:21:53 +02:00

Added subscriber: @BYOB

Richard Antalik commented

2020-09-17 19:21:53 +02:00

@BYOB Hi, I don't know if you know about this issue, but since you are Luxcore dev can you share some information that can help us track and fix this?

Simon Wendsche commented

2020-09-17 22:06:55 +02:00

With Blender 2.9 and latest BlendLuxCore v2.5 I can not reproduce the problem.

Nandeya charles commented

2020-09-18 10:43:54 +02:00

Blender 2.9 and latest BlendLuxCore v2.5 same issue with two files :

and this one

Blender 2.9 and latest BlendLuxCore v2.5 same issue with two files : [Test blend.blend](https://archive.blender.org/developer/F8894899/Test_blend.blend) [XX0001-0100.avi](https://archive.blender.org/developer/F8894898/XX0001-0100.avi) and this one [0001-0070.avi](https://archive.blender.org/developer/F8894906/0001-0070.avi) [#76381.blend](https://archive.blender.org/developer/F8894905/T76381.blend)

Simon Wendsche commented

2020-09-18 12:53:26 +02:00

You should include a description what the actual bug is.
I thought the problem was that keyframes can't be set on properties of custom nodes, or don't show up in the UI.

However, the actual problem is that keyframes on custom node properties are either not evaluated or not updated when doing a final render of the full animation with Ctrl+F12. Rendering individual frames with F12 works as expected, and the keyframes show up in the UI as yellow/green on the node properties.

I can reproduce the issue with Blender 2.9 and BlendLuxCore v2.5 (have not tested other versions of either).

You should include a description what the actual bug is. I thought the problem was that keyframes can't be set on properties of custom nodes, or don't show up in the UI. However, the actual problem is that keyframes on custom node properties are either not evaluated or not updated *when doing a final render of the full animation with Ctrl+F12*. Rendering individual frames with F12 works as expected, and the keyframes show up in the UI as yellow/green on the node properties. I can reproduce the issue with Blender 2.9 and BlendLuxCore v2.5 (have not tested other versions of either).

Simon Wendsche commented

2020-09-18 13:33:31 +02:00

I have put together a minimal script to show the issue without requiring the installation of the BlendLuxCore addon:

custom_node_props_test.zip

Open scene in Blender 2.9
Press "run script" in the text editor on the left
Hover the mouse over the float property of the node on the right, and set a keyframe with I
Advance 10 frames, change the value (e.g. to 20) and set another keyframe
Go back to frame 1, and again advance 10 frames. Check the console, it will show an output like this:

frame: 1
my_float_prop: 1.0
---
frame: 2
my_float_prop: 1.6515774726867676
---
frame: 3
my_float_prop: 3.3978052139282227
---
frame: 4
my_float_prop: 5.925926208496094
---
frame: 5
my_float_prop: 8.923182487487793
---
frame: 6
my_float_prop: 12.076818466186523
---
frame: 7
my_float_prop: 15.074075698852539
---
frame: 8
my_float_prop: 17.602191925048828
---
frame: 9
my_float_prop: 19.34842300415039
---
frame: 10
my_float_prop: 20.0
---

Render with Ctrl+F12
Check the console again, it will show an output like this:

Saved: 'C:\tmp\0001.png'
 Time: 00:00.41 (Saving: 00:00.00)

frame: 2
my_float_prop: 20.0
---
Saved: 'C:\tmp\0002.png'
 Time: 00:00.01 (Saving: 00:00.00)

frame: 3
my_float_prop: 20.0
---
Saved: 'C:\tmp\0003.png'
 Time: 00:00.01 (Saving: 00:00.00)

frame: 4
my_float_prop: 20.0
---
Saved: 'C:\tmp\0004.png'
 Time: 00:00.01 (Saving: 00:00.00)

frame: 5
my_float_prop: 20.0
---
Saved: 'C:\tmp\0005.png'
 Time: 00:00.01 (Saving: 00:00.00)

frame: 6
my_float_prop: 20.0
---
Saved: 'C:\tmp\0006.png'
 Time: 00:00.00 (Saving: 00:00.00)

frame: 7
my_float_prop: 20.0
---
Saved: 'C:\tmp\0007.png'
 Time: 00:00.00 (Saving: 00:00.00)

frame: 8
my_float_prop: 20.0
---
Saved: 'C:\tmp\0008.png'
 Time: 00:00.00 (Saving: 00:00.00)

frame: 9
my_float_prop: 20.0
---
Saved: 'C:\tmp\0009.png'
 Time: 00:00.01 (Saving: 00:00.00)

frame: 10
my_float_prop: 20.0
---
Saved: 'C:\tmp\0010.png'
 Time: 00:00.00 (Saving: 00:00.00)

frame: 10
my_float_prop: 20.0
---

So, in a frame_change_post handler, the custom property is animated correctly, but during final render animation it is not updated.

I have put together a minimal script to show the issue without requiring the installation of the BlendLuxCore addon: [custom_node_props_test.zip](https://archive.blender.org/developer/F8895289/custom_node_props_test.zip) * Open scene in Blender 2.9 * Press "run script" in the text editor on the left * Hover the mouse over the float property of the node on the right, and set a keyframe with I * Advance 10 frames, change the value (e.g. to 20) and set another keyframe * Go back to frame 1, and again advance 10 frames. Check the console, it will show an output like this: ``` frame: 1 my_float_prop: 1.0 --- frame: 2 my_float_prop: 1.6515774726867676 --- frame: 3 my_float_prop: 3.3978052139282227 --- frame: 4 my_float_prop: 5.925926208496094 --- frame: 5 my_float_prop: 8.923182487487793 --- frame: 6 my_float_prop: 12.076818466186523 --- frame: 7 my_float_prop: 15.074075698852539 --- frame: 8 my_float_prop: 17.602191925048828 --- frame: 9 my_float_prop: 19.34842300415039 --- frame: 10 my_float_prop: 20.0 --- ``` * Render with Ctrl+F12 * Check the console again, it will show an output like this: ``` Saved: 'C:\tmp\0001.png' Time: 00:00.41 (Saving: 00:00.00) frame: 2 my_float_prop: 20.0 --- Saved: 'C:\tmp\0002.png' Time: 00:00.01 (Saving: 00:00.00) frame: 3 my_float_prop: 20.0 --- Saved: 'C:\tmp\0003.png' Time: 00:00.01 (Saving: 00:00.00) frame: 4 my_float_prop: 20.0 --- Saved: 'C:\tmp\0004.png' Time: 00:00.01 (Saving: 00:00.00) frame: 5 my_float_prop: 20.0 --- Saved: 'C:\tmp\0005.png' Time: 00:00.01 (Saving: 00:00.00) frame: 6 my_float_prop: 20.0 --- Saved: 'C:\tmp\0006.png' Time: 00:00.00 (Saving: 00:00.00) frame: 7 my_float_prop: 20.0 --- Saved: 'C:\tmp\0007.png' Time: 00:00.00 (Saving: 00:00.00) frame: 8 my_float_prop: 20.0 --- Saved: 'C:\tmp\0008.png' Time: 00:00.00 (Saving: 00:00.00) frame: 9 my_float_prop: 20.0 --- Saved: 'C:\tmp\0009.png' Time: 00:00.01 (Saving: 00:00.00) frame: 10 my_float_prop: 20.0 --- Saved: 'C:\tmp\0010.png' Time: 00:00.00 (Saving: 00:00.00) frame: 10 my_float_prop: 20.0 --- ``` So, in a `frame_change_post` handler, the custom property is animated correctly, but during final render animation it is not updated.

Nandeya charles commented

2020-09-21 13:45:31 +02:00

Any update about this issue fix ?

Richard Antalik commented

2020-09-28 06:50:18 +02:00

@BYOB Thanks a lot for minimal example file. I checked this in 2.90 and I can confirm this issue, but I can't reproduce in latest 2.91.

@sharlybg can you download latest development build from https://builder.blender.org/download/ and check if problem is still there?

@BYOB Thanks a lot for minimal example file. I checked this in 2.90 and I can confirm this issue, but I can't reproduce in latest 2.91. @sharlybg can you download latest development build from https://builder.blender.org/download/ and check if problem is still there?

Ankit Meel commented

2020-10-07 11:38:10 +02:00

Added subscriber: @ankitm

Ankit Meel commented

2020-10-07 11:38:10 +02:00

Any update here, @sharlybg ?

Nandeya charles commented

2020-10-14 18:50:23 +02:00

Lastest 2.91 and luxcore give black screen in render viewport so it is impossible to test.

Nandeya charles commented

2020-10-14 19:05:45 +02:00

Official 2.90.1 and blendluxcore 2.4 Work :

2.4.avi

Official 2.90.1 and blendluxcore 2.5 Don't Work in Final render : But strangelly work in viewport.

2.5.avi

Official 2.90.1 and blendluxcore 2.4 Work : [2.4.avi](https://archive.blender.org/developer/F8990695/2.4.avi) Official 2.90.1 and blendluxcore 2.5 **Don't** Work in Final render : **But strangelly work in viewport**. [2.5.avi](https://archive.blender.org/developer/F8990700/2.5.avi)

Ankit Meel commented

2020-10-15 12:03:05 +02:00

Is it the same bug as #71908 (Keyframed parameters are not preserved when frame_change_post handler is used) ?

Richard Antalik commented

2020-10-15 18:54:31 +02:00

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

Richard Antalik closed this issue

2020-10-15 18:54:31 +02:00

Richard Antalik self-assigned this 2020-10-15 18:54:31 +02:00

Richard Antalik commented

2020-10-15 18:54:31 +02:00

I with provided example script I still have no issues in 2.91. Also if the issue truly boils down to what is in provided example file, then it is not the same issue as #71908.

Since I can reproduce issue in 2.90 and not in 2.91 I will close this report now. If this bug can be reproduced in 2.91 please comment here or open new report.

I with provided example script I still have no issues in 2.91. Also if the issue truly boils down to what is in provided example file, then it is not the same issue as #71908. Since I can reproduce issue in 2.90 and not in 2.91 I will close this report now. If this bug can be reproduced in 2.91 please comment here or open new report.

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Blender 2.9 external renderer shader node bug #80780