EEVEE viewport error when using volume and lights (with animation) #70045

New Issue

Andrea Weikert · 2019-09-19T00:23:44+02:00

Andrea Weikert commented

2019-09-19 00:23:44 +02:00

System Information
Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 425.25

Blender Version
Tested with the following two versions:
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: f6cb5f5449
Broken: version: 2.81 (sub 11), branch: master, commit date: 2019-09-18 12:51, hash: b962aca800
Worked: (optional)

Short description of error
When enabling a Volume Scatter shader in the World Settings with anisotropy set to 1.0, a simple point light is emitting a streak of light when the camera is animated. This does not show when the animation is rendered.

Exact steps for others to reproduce the error

eevee_volumetric.blend

With the attached .blend file:

Open the attached .blend file
Switch to rendered view (renderer should be Eevee)

Play the animation

To reproduce from scratch (just for info on what I did)

Default scene, delete cube, renderer should be Eevee
set intensity of point light to high intensity (1000W or so should be enough to see the effect)
add Volume Scatter BSDF to Volume output of the world shader with low intensity (0.010) and Anisotropy set to 1.0
Place the light so that it can be seen in camera view somewhere on the right side and animate two keyframes for the camera so that the light moves from right to left. (Test file anmiates for 40 frames)

switch to Rendered view and play animation

Note 1
Has been reported as second issue in #58023 with the system info below, so reporting it separately here to be able to close #58023 as the primary issue there is solved.

System Information
Operating system: Darwin-18.7.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 575 OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.11.20
Blender Version
Broken: version: 2.81 (sub 11), branch: master, commit date: 2019-09-16 21:02, hash: 76650402f3

Note 2
I wasn't sure if #53588 could be same underlying cause, feel free to de-duplicate this report if it is.

Note 3
I checked that it also happens when using scene lights and world in 'Material Preview' (LookDev) mode

**System Information** Operating system: Windows-7-6.1.7601-SP1 64 Bits Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 425.25 **Blender Version** Tested with the following two versions: Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: `f6cb5f5449` Broken: version: 2.81 (sub 11), branch: master, commit date: 2019-09-18 12:51, hash: `b962aca800` Worked: (optional) **Short description of error** When enabling a Volume Scatter shader in the World Settings with anisotropy set to 1.0, a simple point light is emitting a streak of light when the camera is animated. This does not show when the animation is rendered. ![blender_display_glitch.png](https://archive.blender.org/developer/F7756992/blender_display_glitch.png) **Exact steps for others to reproduce the error** [eevee_volumetric.blend](https://archive.blender.org/developer/F7757024/eevee_volumetric.blend) With the attached .blend file: - Open the attached .blend file - Switch to rendered view (renderer should be Eevee) # Play the animation To reproduce from scratch (just for info on what I did) - Default scene, delete cube, renderer should be Eevee - set intensity of point light to high intensity (1000W or so should be enough to see the effect) - add Volume Scatter BSDF to Volume output of the world shader with low intensity (0.010) and Anisotropy set to 1.0 - Place the light so that it can be seen in camera view somewhere on the right side and animate two keyframes for the camera so that the light moves from right to left. (Test file anmiates for 40 frames) # switch to Rendered view and play animation **Note 1** Has been reported as second issue in #58023 with the system info below, so reporting it separately here to be able to close #58023 as the primary issue there is solved. System Information Operating system: Darwin-18.7.0-x86_64-i386-64bit 64 Bits Graphics card: AMD Radeon Pro 575 OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.11.20 Blender Version Broken: version: 2.81 (sub 11), branch: master, commit date: 2019-09-16 21:02, hash: `76650402f3` **Note 2** I wasn't sure if #53588 could be same underlying cause, feel free to de-duplicate this report if it is. **Note 3** I checked that it also happens when using scene lights and world in 'Material Preview' (LookDev) mode

Andrea Weikert commented

2019-09-19 00:23:44 +02:00

Added subscriber: @elubie

Andrea Weikert commented

2019-09-19 00:50:45 +02:00

Added subscriber: @Kent-Davis

Dalai Felinto commented

2019-09-19 01:02:25 +02:00

Added subscribers: @fclem, @dfelinto

Dalai Felinto commented

2019-09-19 01:02:25 +02:00

The light strike doesn't work even if you manually advance the frames (as oppose to playback).

@fclem what is the bug? The playback or the still renders?

The light strike doesn't work even if you manually advance the frames (as oppose to playback). @fclem what is the bug? The playback or the still renders?

Firepal commented

2019-09-19 17:00:58 +02:00

Added subscriber: @Firepal

Firepal commented

2019-09-19 17:00:58 +02:00

As far as I can tell, the issue here is the temporal blending applied to volumetrics which is not able to reposition the volumetric lighting correctly and the Anisotropy value at 1 amplifying the issue.
You can see this phenomenon easier by setting the Viewport Samples to 1 and moving around the scene.

I've noticed a few variants of this issue on my own before...

As far as I can tell, the issue here is the temporal blending applied to volumetrics which is not able to reposition the volumetric lighting correctly and the Anisotropy value at 1 amplifying the issue. You can see this phenomenon easier by setting the Viewport Samples to 1 and moving around the scene. I've noticed a few variants of this issue on my own before...

Kent Davis commented

2019-09-28 14:49:26 +02:00

Same as mine. Loo last scroll move up until end there.
Ignore on top. Just scroll move up until end you can see.
https://developer.blender.org/T58023

September 17, 2019

System Information
Operating system: Darwin-18.7.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 575 OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.11.20

Blender Version
Broken: version: 2.81 (sub 11), branch: master, commit date: 2019-09-16 21:02, hash: 76650402f3
Worked: (optional)

@Andrea Weikert (elubie) You may check on Layout TAB and click play you can notice light lamb cause something wrong look funny while render I don't know word to explain you.

Link ticket
Link picture

There for Macintosh only. Not for Windows.

Now you can see AMD https://www.youtube.com/watch?time_continue=18&v=C49IYlJy_oY

Same as mine. Loo last scroll move up until end there. Ignore on top. Just scroll move up until end you can see. https://developer.blender.org/T58023 September 17, 2019 System Information Operating system: Darwin-18.7.0-x86_64-i386-64bit 64 Bits Graphics card: AMD Radeon Pro 575 OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.11.20 Blender Version Broken: version: 2.81 (sub 11), branch: master, commit date: 2019-09-16 21:02, hash: 76650402f3 Worked: (optional) @Andrea Weikert (elubie) You may check on Layout TAB and click play you can notice light lamb cause something wrong look funny while render I don't know word to explain you. [Link ticket ](https://dev-files.blender.org/file/data/liokecvdv7rymuraik2w/PHID-FILE-) [Link picture ](hcal7fou6ygxrs5od7rr/Screen_Shot_2019-09-17_at_3.27.58_PM.png) There for Macintosh only. Not for Windows. Now you can see AMD https://www.youtube.com/watch?time_continue=18&v=C49IYlJy_oY

Clément Foucault commented

2020-01-23 15:41:30 +01:00

This is a known issue of the temporal reprojection of volumetrics. We should do smarter anti bleeding but it would bias the result.

Jacob Merrill commented

2020-01-23 15:56:14 +01:00

Added subscriber: @JacobMerrill-1

Jacob Merrill commented

2020-01-23 15:56:14 +01:00

can we expect ATAA at some point?

Satish Goda commented

2022-03-23 18:57:51 +01:00

Added subscriber: @satishgoda1

Philipp Oeser removed the

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EEVEE viewport error when using volume and lights (with animation) #70045

Play the animation

switch to Rendered view and play animation