Create the shadow catcher in eevee give a black result #87272

New Issue

blendcmds · 2021-04-07T19:32:15+02:00

blendcmds commented

2021-04-07 19:32:15 +02:00

System Information
Operating system: Windows 10 64bits
Graphics card: NVIDIA GeForce RTX 2060
Blender Version
Broken: 2.90, 2.91, 2.92, 2.93
Worked: 2.83.12

Short description of error
I followed the tutorial how to make a shadow catcher on eevee (https://artisticrender.com/how-to-create-a-shadow-catcher-with-eevee-in-blender/). But it makes the result totally black when using version 2.90 and i've tried 2.91, 2.92, and 2.93. But the result is the same

In 2.83 the result is like this

Exact steps for others to reproduce the error
shadow_bug.blend

**System Information** Operating system: Windows 10 64bits Graphics card: NVIDIA GeForce RTX 2060 **Blender Version** Broken: 2.90, 2.91, 2.92, 2.93 Worked: 2.83.12 **Short description of error** I followed the tutorial how to make a shadow catcher on eevee (https://artisticrender.com/how-to-create-a-shadow-catcher-with-eevee-in-blender/). But it makes the result totally black when using version 2.90 and i've tried 2.91, 2.92, and 2.93. But the result is the same ![2.92.png](https://archive.blender.org/developer/F9923135/2.92.png) In 2.83 the result is like this ![2.83.jpg](https://archive.blender.org/developer/F9923132/2.83.jpg) **Exact steps for others to reproduce the error** [shadow_bug.blend](https://archive.blender.org/developer/F9923137/shadow_bug.blend)

blendcmds commented

2021-04-07 19:32:15 +02:00

Added subscriber: @Ikyuv

Dean Jones commented

2021-04-08 09:39:54 +02:00

Added subscriber: @DeanKJones

Dean Jones commented

2021-04-08 09:39:54 +02:00

This comment was removed by @DeanKJones

*This comment was removed by @DeanKJones*

Philipp Oeser commented

2021-04-08 09:47:28 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2021-04-08 09:47:28 +02:00

Seems to be a problem with Alpha Clip in this case, Alpha Blend is fine

Seems to be a problem with `Alpha Clip` in this case, `Alpha Blend` is fine

Philipp Oeser commented

2021-04-08 10:17:54 +02:00

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

Philipp Oeser commented

2021-04-08 10:17:54 +02:00

Added subscriber: @fclem

Philipp Oeser commented

2021-04-08 10:17:54 +02:00

Will confirm for now, looks like Alpha Clip is not evaluated correctly if the tree is slightly more complex than a simple Mix Shader (where it is still working fine).

Related commits:

CC @fclem

Will confirm for now, looks like Alpha Clip is not evaluated correctly if the tree is slightly more complex than a simple Mix Shader (where it is still working fine). Related commits: - b18c2a3c41 - 96e8dadda0 CC @fclem

blendcmds commented

2021-06-25 21:08:35 +02:00

Changed status from 'Confirmed' to: 'Resolved'

blendcmds closed this issue

2021-06-25 21:08:35 +02:00

Clément Foucault commented

2021-10-15 20:10:42 +02:00

Changed status from 'Resolved' to: 'Confirmed'

Clément Foucault reopened this issue

2021-10-15 20:10:42 +02:00

Clément Foucault commented

2021-10-15 20:10:42 +02:00

For the record, this is caused by the alpha clip/hashed prepass not evaluating the lighting. This is done for performance reasons. However, we could detect the cases where this is needed and enable it case by case.

On the other hand, a real shadow catcher should be the priority.

For the record, this is caused by the alpha clip/hashed prepass not evaluating the lighting. This is done for performance reasons. However, we could detect the cases where this is needed and enable it case by case. On the other hand, a real shadow catcher should be the priority.

Philipp Oeser removed the

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Create the shadow catcher in eevee give a black result #87272