Turning Cast Shadows in Light Settings off makes makes dark glitches. #91024

New Issue

Samanwaya Datta · 2021-08-29T11:37:08+02:00

Samanwaya Datta commented

2021-08-29 11:37:08 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: Intel(R) HD Graphics 4400 Intel 4.3.0 - Build 20.19.15.4531

Blender Version
Broken: version: 3.0.0 Alpha, branch: cycles-x, commit date: 2021-08-27 13:47, hash: 7d5e8d2bc1
Worked: It works in the Latest 2.93 release.

Short description of error
When turning off the "Cast Shadows" settings or check-box in the Light Settings(Object Data Properties), the rendering causes a glitch and this happens :
{F10347142, size=full}
With the "Cast Shadows" on or checked, it works as expected :
{F10347146, size=full}

Upon Further Investigation, it seems this bug occurs only when adding a Plane primitive. When adding a cube, or a torus or anything, the glitch does not occur and occurs only when adding a Plane primitive.
Also, when hitting F12 to render the image, the rendered image is fine :
{F10347186, size=full}

Exact steps for others to reproduce the error

Open an empty scene or .blend file.
Add a Plane primitive.
Change the render engine to Cycles.
Go to Object Data Properties of Light.
Turn off Cast Shadows setting, and hit the Render option in Viewport.

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: Intel(R) HD Graphics 4400 Intel 4.3.0 - Build 20.19.15.4531 **Blender Version** Broken: version: 3.0.0 Alpha, branch: cycles-x, commit date: 2021-08-27 13:47, hash: `7d5e8d2bc1` Worked: It works in the Latest 2.93 release. **Short description of error** When turning off the "Cast Shadows" settings or check-box in the Light Settings(Object Data Properties), the rendering causes a glitch and this happens : {[F10347142](https://archive.blender.org/developer/F10347142/image.png), size=full} With the "Cast Shadows" on or checked, it works as expected : {[F10347146](https://archive.blender.org/developer/F10347146/image.png), size=full} Upon Further Investigation, it seems this bug occurs only when adding a Plane primitive. When adding a cube, or a torus or anything, the glitch does not occur and occurs only when adding a Plane primitive. Also, when hitting F12 to render the image, the rendered image is fine : {[F10347186](https://archive.blender.org/developer/F10347186/image.png), size=full} **Exact steps for others to reproduce the error** * Open an empty scene or `.blend` file. * Add a Plane primitive. * Change the render engine to Cycles. * Go to Object Data Properties of Light. * Turn off Cast Shadows setting, and hit the Render option in Viewport.

Samanwaya Datta commented

2021-08-29 11:37:08 +02:00

Added subscriber: @Sammie156

Samanwaya Datta commented

2021-08-29 12:57:12 +02:00

A Video Demonstration of the bug. The Rendering issue comes up only when adding a plane, otherwise it renders fine.

Z7oxCBDckE.mp4

A Video Demonstration of the bug. The Rendering issue comes up only when adding a plane, otherwise it renders fine. [Z7oxCBDckE.mp4](https://archive.blender.org/developer/F10347735/Z7oxCBDckE.mp4)

Pratik Borhade commented

2021-08-30 10:11:12 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-08-30 10:11:12 +02:00

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

Pratik Borhade commented

2021-08-30 10:11:12 +02:00

Broken: version: 3.0.0 Alpha, branch: cycles-x, commit date: 2021-08-27 13:47,

Hi, thanks for the report. I can not reproduce on master (3.0.0, b42354672e80) . Issue may be specific to Cycles-X branch? Can you please confirm?

Graphics card: Intel(R) HD Graphics 4400 Intel 4.3.0 - Build 20.19.15.4531

Also: try reproducing the problem after upgrading the driver: https://docs.blender.org/manual/en/latest/troubleshooting/gpu/windows/intel.html

System Information

Graphics card : AMD Radeon(TM) 535 ATI Technologies .```

>Broken: version: 3.0.0 Alpha, branch: cycles-x, commit date: 2021-08-27 13:47, Hi, thanks for the report. I can not reproduce on master (3.0.0, `b42354672e80`) . Issue may be specific to Cycles-X branch? Can you please confirm? >Graphics card: Intel(R) HD Graphics 4400 Intel 4.3.0 - Build 20.19.15.4531 Also: try reproducing the problem after upgrading the driver: https://docs.blender.org/manual/en/latest/troubleshooting/gpu/windows/intel.html --- **System Information** ```Operating system : Windows-10-10.0.18362-SP0 64 Bits Graphics card : AMD Radeon(TM) 535 ATI Technologies .```

Samanwaya Datta commented

2021-08-30 10:21:09 +02:00

Hello @PratikPB2123 !! Thanks for replying. Yes, the issue is specific to the Cycles-X branch. Also, the Drivers are up to date. I've checked them. They seem to be at the latest version.

Samanwaya Datta commented

2021-08-30 10:22:23 +02:00

Also, the issue only arises when adding a plane primitive. With the scene having torus, Suzanne head, and a lot more objects the issue doesn't occur so its unlikely to be a graphics driver issue.

Pratik Borhade commented

2021-08-30 11:12:44 +02:00

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

Pratik Borhade closed this issue

2021-08-30 11:12:44 +02:00

Pratik Borhade commented

2021-08-30 11:12:44 +02:00

Hi, thank you for checking. Tracker is not yet open for the Cycles-X bug report.

Refer the Sergey's comment:

In #90848#1210038, @Sergey wrote:
Thanks for bringing it to our attention, we will check on it.

As for official policy, we are not open for receiving Cycles X issues in the bug tracker. Best ways to provide feedback is either the devtalk (https:*devtalk.blender.org/t/cycles-x-feedback/18598) or talk to us in the render-cycles-module room on blender.chat (https:*blender.chat/channel/render-cycles-module).

So I will have to close the task. Thanks again for the report :)

Hi, thank you for checking. Tracker is not yet open for the Cycles-X bug report. Refer the Sergey's comment: > In #90848#1210038, `@Sergey` wrote: > Thanks for bringing it to our attention, we will check on it. > > As for official policy, we are not open for receiving Cycles X issues in the bug tracker. Best ways to provide feedback is either the devtalk (https:*devtalk.blender.org/t/cycles-x-feedback/18598) or talk to us in the render-cycles-module room on blender.chat (https:*blender.chat/channel/render-cycles-module). So I will have to close the task. Thanks again for the report :)

blender-admin commented

2021-09-01 17:02:07 +02:00

This issue was referenced by 56d4366294ed45523331e8afa7be722dc5f53025

Brecht Van Lommel commented

2021-09-01 19:36:58 +02:00

Changed status from 'Archived' to: 'Resolved'

Samanwaya Datta commented

2021-09-01 20:17:10 +02:00

Thank you so much for working on this Brecht Sir!

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Turning Cast Shadows in Light Settings off makes makes dark glitches. #91024