shadow catcher planes appear to let the sunlight in the environment HDRI to pass through causing unwanted shadows #87611

Closed
opened 2021-04-18 23:10:09 +02:00 by Ajay Kumar Mishra · 8 comments

System Information
Operating system: MacOS Catalina 10.15.7
Graphics card: No graphics card

Blender Version
Broken: 2.92
Worked: NA

Short description of error
Shouldn't the shadow catcher planes block the sunlight instead of letting it pass through?

Exact steps for others to reproduce the error

Create a room, carve out windows, assign material and use HDRI to light the scene.
Add the objects on the floor and walls.
Make all objects created in step 1 "Shadow Catcher"
Render the scene.
Here's the rendered image. Please notice the strong shadow cast by the paintings and directly underneath the monkey.
uploads_1617148363937-shadow_catcher_problem_render_0.png

Removing the shadow catcher attribute from the wall, ceiling and floor planes, I see this rendering below wherein the shadow seems consistent.
uploads_1617148495718-shadow_catcher_problem_render_w_all_planes_visible.png

.shadow_catcher_problem_example.blend.icloud

Based on the default startup or an attached .blend file (as simple as possible): The blend file is available here as well: https://drive.google.com/drive/folders/1hp8JSoKK4ISykngS6NSBOttygp4bX-7K

Thanks!

**System Information** Operating system: MacOS Catalina 10.15.7 Graphics card: No graphics card **Blender Version** Broken: 2.92 Worked: NA **Short description of error** Shouldn't the shadow catcher planes block the sunlight instead of letting it pass through? **Exact steps for others to reproduce the error** Create a room, carve out windows, assign material and use HDRI to light the scene. Add the objects on the floor and walls. Make all objects created in step 1 "Shadow Catcher" Render the scene. Here's the rendered image. Please notice the strong shadow cast by the paintings and directly underneath the monkey. ![uploads_1617148363937-shadow_catcher_problem_render_0.png](https://archive.blender.org/developer/F9966373/uploads_1617148363937-shadow_catcher_problem_render_0.png) Removing the shadow catcher attribute from the wall, ceiling and floor planes, I see this rendering below wherein the shadow seems consistent. ![uploads_1617148495718-shadow_catcher_problem_render_w_all_planes_visible.png](https://archive.blender.org/developer/F9966391/uploads_1617148495718-shadow_catcher_problem_render_w_all_planes_visible.png) [.shadow_catcher_problem_example.blend.icloud](https://archive.blender.org/developer/F9966408/.shadow_catcher_problem_example.blend.icloud) Based on the default startup or an attached .blend file (as simple as possible): The blend file is available here as well: https://drive.google.com/drive/folders/1hp8JSoKK4ISykngS6NSBOttygp4bX-7K Thanks!

Added subscriber: @mishraka-1

Added subscriber: @mishraka-1

Added subscriber: @Zandman

Added subscriber: @Zandman

Added subscriber: @Garek

Added subscriber: @Garek

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

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

Hi, thanks for the report. I did not tried to reproduce issue yet however in 3.0 shadow catcher was rewritten, see:
https://wiki.blender.org/wiki/Reference/Release_Notes/3.0/Cycles#Shadow_Catcher
Can you try 3.0 and see if issue is still here?

Hi, thanks for the report. I did not tried to reproduce issue yet however in 3.0 shadow catcher was rewritten, see: https://wiki.blender.org/wiki/Reference/Release_Notes/3.0/Cycles#Shadow_Catcher Can you try 3.0 and see if issue is still here?
Member

Added subscriber: @PratikPB2123

Added subscriber: @PratikPB2123
Member

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

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

Hi, thanks for the report.
I'm not able to see similar problem in latest blender versions.
So I assume issue is gone and can be closed.
Feel free to comment if there is any misunderstanding. I'll reopen the report in that case

2.92 3.2.0
prog.PNG prog.PNG
Hi, thanks for the report. I'm not able to see similar problem in latest blender versions. So I assume issue is gone and can be closed. Feel free to comment if there is any misunderstanding. I'll reopen the report in that case | 2.92 | 3.2.0 | | -- | -- | | ![prog.PNG](https://archive.blender.org/developer/F13031720/prog.PNG) | ![prog.PNG](https://archive.blender.org/developer/F13031707/prog.PNG) |
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Reference: blender/blender#87611
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