A black spot in the sun on reflective surface #98780

New Issue

Laika · 2022-06-11T01:07:49+02:00

Laika commented

2022-06-11 01:07:49 +02:00

System Information
Operating system: Windows-10-10.0.19043 64 Bit
Graphics card: NVIDIA GeForce RTX 3090/ NVIDIA 512.95

Blender Version
Broken: in 3.2 has a black spot in the sun on reflective surface
Worked: in 3.1 and in 3.2 with OptiX Denoise

Sorry for my English language :)

Short description of error
When you render scene with a reflective surface and a sun in 3.2 you will get black spot in sun reflection

Exact steps for others to reproduce the error

Create a scene in 3.2 Blender
Delete default cube :)
Delete light
Create a sphere
Shade smooth the sphere
Create a Principled BSDF material (on Sphere)
Set Metallic to 1
Set Roughness to 0.02
Create Sun light
Set Strength of the Sun to 10000
Set the Angle of the sun to 15°
Turn off Denoise
Press Render (That's all)

Blend file (All steps included)
BlackSpotProblem.blend

**System Information** Operating system: Windows-10-10.0.19043 64 Bit Graphics card: NVIDIA GeForce RTX 3090/ NVIDIA 512.95 **Blender Version** Broken: in 3.2 has a black spot in the sun on reflective surface Worked: in 3.1 and in 3.2 with OptiX Denoise Sorry for my English language :) **Short description of error** When you render scene with a reflective surface and a sun in 3.2 you will get black spot in sun reflection **Exact steps for others to reproduce the error** 1. Create a scene in 3.2 Blender 2. Delete default cube :) 3. Delete light 4. Create a sphere 5. Shade smooth the sphere 6. Create a Principled BSDF material (on Sphere) 7. Set Metallic to 1 8. Set Roughness to 0.02 9. Create Sun light 10. Set Strength of the Sun to 10000 11. Set the Angle of the sun to 15° 12. Turn off Denoise 13. Press Render (That's all) Blend file (All steps included) [BlackSpotProblem.blend](https://archive.blender.org/developer/F13144243/BlackSpotProblem.blend) ![2022-06-11_17-53-35.png](https://archive.blender.org/developer/F13145973/2022-06-11_17-53-35.png)

Laika commented

2022-06-11 01:07:49 +02:00

Added subscriber: @Leftunderatree

Fernando Alcala commented

2022-06-11 07:06:22 +02:00

Added subscriber: @Fernando-Alcala

Fernando Alcala commented

2022-06-11 07:06:22 +02:00

It has to do with Filmic. In 3.2, both Filmic and Filmic Log get the black spot. In 3.1, only Filmic Log gets the black spot.

Pratik Borhade commented

2022-06-11 14:38:33 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-06-11 14:38:33 +02:00

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

Pratik Borhade commented

2022-06-11 14:38:33 +02:00

Hi, thanks for the report. I'm not able to reproduce this in 3.2 release version.
Are you rendering with CPU or GPU? Your render device is set to CUDA or Optix?

Operating system : Windows-10-10.0.18362-SP0 64 Bits
Graphics card : AMD Radeon(TM) 535 ATI Technologies .```

Hi, thanks for the report. I'm not able to reproduce this in 3.2 release version. Are you rendering with CPU or GPU? Your render device is set to CUDA or Optix? ```System Information Operating system : Windows-10-10.0.18362-SP0 64 Bits Graphics card : AMD Radeon(TM) 535 ATI Technologies .```

Laika commented

2022-06-11 16:49:57 +02:00

I'm rendering on GPU.
My render device is set to OptiX.

I also tried it with Cuda GPU; Cuda CPU and Optix CPU and the problem still exists.

I'm rendering on GPU. My render device is set to OptiX. I also tried it with Cuda GPU; Cuda CPU and Optix CPU and the problem still exists.

Laika commented

2022-06-11 16:56:36 +02:00

I found a strange thing:
If I save a rendered image with a black spot a spot disappears.
So it only shows in Render window

That's how it looks (I screenshotted Render window):

I found a strange thing: If I save a rendered image with a black spot a spot disappears. So it only shows in Render window That's how it looks (I screenshotted Render window): ![2022-06-11_17-53-35.png](https://archive.blender.org/developer/F13145973/2022-06-11_17-53-35.png)

Riccardo Giovanetti commented

2022-06-11 18:02:09 +02:00

Added subscriber: @Harvester

Riccardo Giovanetti commented

2022-06-11 18:02:10 +02:00

FYI, here on:

Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.96

Blender version: 3.2.0, branch: master, commit date: 2022-06-08 10:22, hash: e05e1e3691

Opening the provided test file I don't see any black spots in the Viewport. Rendering either with CPU or GPU with CUDA or OPTIX option enabled.

FYI, here on: Operating system: Windows-10-10.0.19043-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.96 Blender version: 3.2.0, branch: master, commit date: 2022-06-08 10:22, hash: `e05e1e3691` Opening the provided test file I don't see any black spots in the Viewport. Rendering either with CPU or GPU with CUDA or OPTIX option enabled.

Pratik Borhade commented

2022-06-11 18:25:26 +02:00

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

Fernando Alcala commented

2022-06-11 20:45:45 +02:00

Windows 10, GTX 1080Ti

3.1

CPU - can not reproduce
GPU 
  Cuda - can reproduce on Filmic Log and False Color
  Optix - can reproduce on Filmic Log and False Color

3.2 (not a beta version this time) - can not reproduce

Windows 10, GTX 1080Ti 3.1 ``` CPU - can not reproduce GPU Cuda - can reproduce on Filmic Log and False Color Optix - can reproduce on Filmic Log and False Color ``` 3.2 (not a beta version this time) - can not reproduce

Evan Wilson commented

2022-06-11 22:01:08 +02:00

Added subscriber: @EAW

Evan Wilson commented

2022-06-11 22:01:08 +02:00

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

Evan Wilson commented

2022-06-11 22:01:08 +02:00

I can confirm. Any value over 65536 is displayed as Black.

In #98780#1372816, @Leftunderatree wrote:
I found a strange thing:
If I save a rendered image with a black spot a spot disappears.
So it only shows in Render window

That's how it looks (I screenshotted Render window):

It seems to be a display only bug, the values are stored in the color channels (can be sampled with the mouse) and properly exported when saving as an OpenEXR file.

In #98780#1372635, @Fernando-Alcala wrote:
It has to do with Filmic. In 3.2, both Filmic and Filmic Log get the black spot. In 3.1, only Filmic Log gets the black spot.

In 3.3 I can get it with Filmic, Filmic Log, and False Color Views. I can also get it with the Standard View if I set a Look.
In 3.1.2 I can only get it with Filmic Log, same as @Fernando-Alcala

@Leftunderatree you can clamp Direct Light as a workaround for now.

Test hardware for triaging
OS: Windows-10-10.0.19043.1052-SP0 64 Bits
GPU: GeForce GTX 470/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 391.35
CPU: i7-950 @3.07 GHz

I can confirm. Any value over 65536 is displayed as Black. > In #98780#1372816, @Leftunderatree wrote: > I found a strange thing: > If I save a rendered image with a black spot a spot disappears. > So it only shows in Render window > > That's how it looks (I screenshotted Render window): > ![2022-06-11_17-53-35.png](https://archive.blender.org/developer/F13145973/2022-06-11_17-53-35.png) It seems to be a display only bug, the values are stored in the color channels (can be sampled with the mouse) and properly exported when saving as an OpenEXR file. > In #98780#1372635, @Fernando-Alcala wrote: > It has to do with Filmic. In 3.2, both Filmic and Filmic Log get the black spot. In 3.1, only Filmic Log gets the black spot. In 3.3 I can get it with Filmic, Filmic Log, and False Color Views. I can also get it with the Standard View if I set a Look. In 3.1.2 I can only get it with Filmic Log, same as @Fernando-Alcala @Leftunderatree you can clamp Direct Light as a workaround for now. --- Test hardware for triaging OS: Windows-10-10.0.19043.1052-SP0 64 Bits GPU: GeForce GTX 470/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 391.35 CPU: i7-950 @3.07 GHz

Jesse Yurkovich commented

2022-06-11 22:11:32 +02:00

Added subscriber: @deadpin