Shadow Caustics not working on Blender 3.2.0 #99257

New Issue

Lucas Oliveira · 2022-06-29T06:17:04+02:00

Lucas Oliveira commented

2022-06-29 06:17:04 +02:00

System Information
Operating system: Windows 11
Graphics card: RTX 3060ti / Ryzen 5600G / 16Gb Ram

Blender Version
Broken: 3.2.0
Worked: None Yet

Shadow Caustics are not Working

By Enabling in the startup default spotlight "Shadow Caustics", setting the Renderer to Cycles, setting "Cast Shadow Caustics" in the "Object Properties" panel of the Mesh with the "Glass BSDF" shader and setting "Receive Shadow Caustics" in the "Object Properties" panel for the Mesh with a simple non transparent nor Refractive material. The shadow just becomes a solid dark like the object was opaque and solid.

**System Information** Operating system: Windows 11 Graphics card: RTX 3060ti / Ryzen 5600G / 16Gb Ram **Blender Version** Broken: 3.2.0 Worked: None Yet Shadow Caustics are not Working By Enabling in the startup default spotlight "Shadow Caustics", setting the Renderer to Cycles, setting "Cast Shadow Caustics" in the "Object Properties" panel of the Mesh with the "Glass BSDF" shader and setting "Receive Shadow Caustics" in the "Object Properties" panel for the Mesh with a simple non transparent nor Refractive material. The shadow just becomes a solid dark like the object was opaque and solid.

Lucas Oliveira commented

2022-06-29 06:17:04 +02:00

Added subscriber: @Starduck.3D

Pratik Borhade commented

2022-06-29 07:07:13 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-06-29 07:07:13 +02:00

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

Pratik Borhade commented

2022-06-29 07:07:13 +02:00

Thanks for the report
Did you enable Shadow caustics from Object data properties panel of light?

Thanks for the report Did you enable Shadow caustics from Object data properties panel of light?

Alaska commented

2022-06-29 08:51:57 +02:00

Added subscriber: @Alaska

Alaska commented

2022-06-29 08:51:57 +02:00

Providing a .blend file with the issue would be useful.

My guess for why it isn't working is that the object with Cast Shadow Caustics option enabled needs to be set to Shade smooth. If it is Shade Flat (the default for objects) then it will not cast caustics.

Providing a .blend file with the issue would be useful. My guess for why it isn't working is that the object with `Cast Shadow Caustics` option enabled needs to be set to `Shade smooth`. If it is `Shade Flat` (the default for objects) then it will not cast caustics.

Chad Pogchamp commented

2022-06-29 21:29:50 +02:00

Added subscriber: @LordOpof

Chad Pogchamp commented

2022-06-29 21:29:50 +02:00

in the light settings of your light you should check if you have shadow caustics enabled there

Lucas Oliveira commented

2022-06-30 15:57:50 +02:00

@PratikPB2123 Thank you for your response. Everything was set correctly but I mostly tested on Shade Flat objects.

Thank you @Alaska for nailing the problem. I was sure I tested once on a Shade Smooth UV Sphere, but I guess not since when I tried again on a Shade Smooth one, it worked just fine!

Thank you @LordOpof for your suggestion, but everything regarding the settings were covered. Aparently the problem was the need for the Casting object to be smooth.

@PratikPB2123 Thank you for your response. Everything was set correctly but I mostly tested on Shade Flat objects. Thank you @Alaska for nailing the problem. I was sure I tested once on a Shade Smooth UV Sphere, but I guess not since when I tried again on a Shade Smooth one, it worked just fine! Thank you @LordOpof for your suggestion, but everything regarding the settings were covered. Aparently the problem was the need for the Casting object to be smooth.

Alaska commented

2022-07-01 02:20:56 +02:00

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

Alaska closed this issue

2022-07-01 02:20:56 +02:00

Alaska self-assigned this 2022-07-01 02:20:56 +02:00

Alaska commented

2022-07-01 02:20:56 +02:00

Marking as resolved.

Hans Goudey commented

2022-07-01 02:34:50 +02:00

Changed status from 'Resolved' to: 'Archived'

Acrivec Cevirca commented

2024-05-31 19:59:07 +02:00

Please add a note in the Shadow Caustics that it requires smooth shading. I've spent hours trying to figure why aren't the caustics cast when using this techinque.
I mean in Blender UI itself.

Please add a note in the Shadow Caustics that it requires smooth shading. I've spent hours trying to figure why aren't the caustics cast when using this techinque. I mean in Blender UI itself.

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Shadow Caustics not working on Blender 3.2.0 #99257