Specular highlight turns object black on some studio lights. #79184

New Issue

Blake · 2020-07-23T10:03:42+02:00

Blake commented

2020-07-23 10:03:42 +02:00

System Information
Operating system: Linux-5.7.9-arch1-1-x86_64-with-arch-Arch-Linux 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 450.57

Blender Version
Broken: version: 2.90.0 Beta, branch: master, commit date: 2020-07-23 02:23, hash: 4b31f4ace7
Worked: version: 2.90.0 Beta, branch: master, commit date: 2020-07-22 14:02, hash: 0e280b96ca

Short description of error
Specular highlight turns object black on some studio lights.
2020-07-23_10-58-35.mp4

Exact steps for others to reproduce the error

In the Viewport Shading options, choose any of the 3 latest "Studiolight" options

**System Information** Operating system: Linux-5.7.9-arch1-1-x86_64-with-arch-Arch-Linux 64 Bits Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 450.57 **Blender Version** Broken: version: 2.90.0 Beta, branch: master, commit date: 2020-07-23 02:23, hash: `4b31f4ace7` Worked: version: 2.90.0 Beta, branch: master, commit date: 2020-07-22 14:02, hash: `0e280b96ca` **Short description of error** Specular highlight turns object black on some studio lights. [2020-07-23_10-58-35.mp4](https://archive.blender.org/developer/F8715388/2020-07-23_10-58-35.mp4) **Exact steps for others to reproduce the error** - In the `Viewport Shading` options, choose any of the 3 latest "Studiolight" options

Blake commented

2020-07-23 10:03:42 +02:00

Added subscriber: @dearzhen

Germano Cavalcante commented

2020-07-23 16:01:19 +02:00

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

Germano Cavalcante commented

2020-07-23 16:01:49 +02:00

Added subscriber: @mano-wii

Blake commented

2020-07-25 06:58:43 +02:00

I want to make some update on this bug.
It appears only when I build blender using precompiled libraries. I dont't have this bug with Automatic Dependency Installation or download from https://builder.blender.org/download/

Thanks!

I want to make some update on this bug. It appears only when I build blender using precompiled libraries. I dont't have this bug with Automatic Dependency Installation or download from https://builder.blender.org/download/ Thanks!

Germano Cavalcante commented

2020-07-29 17:02:13 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Germano Cavalcante closed this issue

2020-07-29 17:02:13 +02:00

Germano Cavalcante self-assigned this 2020-07-29 17:02:13 +02:00

Germano Cavalcante commented

2020-07-29 17:02:13 +02:00

I reproduced this bug in the informed build, but not the latest daily build, so it appears the bug has been fixed already.

Thanks for the info.

Closing.

I reproduced this bug in the informed build, but not the latest daily build, so it appears the bug has been fixed already. Thanks for the info. Closing.

Blake commented

2020-08-23 12:02:14 +02:00

Unfortunately, I still have this issue on when building with precompiled libraries.

Blake commented

2020-08-24 22:24:31 +02:00

@mano-wii
Also, I've noticed that if I set 'Clip start' setting above 0.015 m object will not be dark anymore.
Hope that helps.
Thanks!

@mano-wii Also, I've noticed that if I set 'Clip start' setting above 0.015 m object will not be dark anymore. Hope that helps. Thanks!

Germano Cavalcante commented

2020-08-25 00:43:41 +02:00

Changed status from 'Resolved' to: 'Confirmed'

Germano Cavalcante reopened this issue

2020-08-25 00:43:41 +02:00

Germano Cavalcante commented

2020-08-25 00:43:41 +02:00

I can confirm.
It is not seen in a Release build.

I can confirm. It is not seen in a Release build.

Blake commented

2020-09-11 14:15:03 +02:00

I can't reproduce this bug in latest build. Hopefully this bug has been fixed.
But custom studio lights appears to be broken.
Thanks!

2020-09-11 15-26-25.mp4

I can't reproduce this bug in latest build. Hopefully this bug has been fixed. But custom studio lights appears to be broken. Thanks! [2020-09-11 15-26-25.mp4](https://archive.blender.org/developer/F8865236/2020-09-11_15-26-25.mp4)

Clément Foucault commented

2020-09-18 23:32:08 +02:00

Added subscriber: @fclem

Clément Foucault commented

2020-09-18 23:32:08 +02:00

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

Clément Foucault commented

2020-09-18 23:32:08 +02:00

I cannot reproduce on linux nor on MacOS. Maybe it's a windows thing? Do you have any error when running with --debug-gpu ? Is this still using precompiled lib and debug build?

I cannot reproduce on linux nor on MacOS. Maybe it's a windows thing? Do you have any error when running with `--debug-gpu` ? Is this still using precompiled lib and debug build?

Blake commented

2020-09-19 16:12:33 +02:00

I am on Arch Linux. I've attached errors that I have when I am running with --debug-gpu. This happens with precompiled libs on make release version.
I can't reproduce this with debug build.

errors.txt

2020-09-19 17-05-37.mp4

I am on Arch Linux. I've attached errors that I have when I am running with --debug-gpu. This happens with precompiled libs on make release version. I can't reproduce this with debug build. [errors.txt](https://archive.blender.org/developer/F8899409/errors.txt) [2020-09-19 17-05-37.mp4](https://archive.blender.org/developer/F8899408/2020-09-19_17-05-37.mp4)

Germano Cavalcante commented

2020-09-21 16:19:37 +02:00

In venturing into Renderdoc, I found that the problem is the value of world_data.lights- [x].diffuse_color_wrap.a used in the get_world_lighting function (workbench_world_light_lib.glsl$46 ).
Its value is -65504.0
Thus:

wrap.w is -65504.0
then gloss.w 65504.0
then shininess.w INF
then spec_light.w nan
then specular_light nan, nan, nan
and so on...

I don't know what this world_data.lights- [x].diffuse_color_wrap.a is and where its value is obtained.

In venturing into Renderdoc, I found that the problem is the value of `world_data.lights- [x].diffuse_color_wrap.a` used in the `get_world_lighting` function ([workbench_world_light_lib.glsl$46 ](https://developer.blender.org/diffusion/B/browse/master/source/blender/draw/engines/workbench/shaders/workbench_world_light_lib.glsl$46)). Its value is `-65504.0` Thus: - `wrap.w` is `-65504.0` - then `gloss.w` `65504.0` - then `shininess.w` `INF` - then `spec_light.w` `nan` - then `specular_light` `nan, nan, nan` - and so on... I don't know what this `world_data.lights- [x].diffuse_color_wrap.a` is and where its value is obtained.

Clément Foucault commented

2020-10-07 11:33:28 +02:00

@mano-wii does this fix the problem? https://developer.blender.org/P1687