Eevee Specular Shader's Clear Coat does not function #63393

New Issue

Alyx Wayland · 2019-04-08T16:48:05+02:00

Alyx Wayland commented

2019-04-08 16:48:05 +02:00

System Information
Operating system: W10
Graphics card: Intel(R) UHD Graphics 600

Blender Version
Broken: 2.80, 75f551faca, master, 2019-04-07 15:02

Short description of error
The Specular shader that is exclusive to EEVEE has clear coat as a part of its node. However, this clear coat does not function. Setting it to 1 does not provide any difference when compared to when it does not have clear coat set to 1. This is in direct contrast to the Principled BSDF, which has a functioning clear coat.

Reproducing the error
Use the file that was attached if you need to see more, or just view the video file I have attached to this post as well. It uses LookDev to use an environment map.
The cube on the left has the specular shader plugged in, with nothing else in the node graph other than a value to show consistency. The cube to the right uses the principled bsdf shader with nothing else in the node graph but a value, just like the other. They both use the same setup: Completely black base color, specular value set to 0, roughness set to 0.2, clear coat roughness set to 0, and clear coat intensity set to 1. The cube on the left, with the specular shader, has no reflection despite the fact that it has clear coat set to 1. On the other hand, the cube to the right that uses principled bsdf has a reflection from the clear coat.
SpecularBugReport.blend
2019-04-08_10-42-49.mp4

**System Information** Operating system: W10 Graphics card: Intel(R) UHD Graphics 600 **Blender Version** Broken: 2.80, 75f551facaf0, master, 2019-04-07 15:02 **Short description of error** The Specular shader that is exclusive to EEVEE has clear coat as a part of its node. However, this clear coat does not function. Setting it to 1 does not provide any difference when compared to when it does not have clear coat set to 1. This is in direct contrast to the Principled BSDF, which has a functioning clear coat. **Reproducing the error** Use the file that was attached if you need to see more, or just view the video file I have attached to this post as well. It uses LookDev to use an environment map. The cube on the left has the specular shader plugged in, with nothing else in the node graph other than a value to show consistency. The cube to the right uses the principled bsdf shader with nothing else in the node graph but a value, just like the other. They both use the same setup: Completely black base color, specular value set to 0, roughness set to 0.2, clear coat roughness set to 0, and clear coat intensity set to 1. The cube on the left, with the specular shader, has no reflection despite the fact that it has clear coat set to 1. On the other hand, the cube to the right that uses principled bsdf has a reflection from the clear coat. [SpecularBugReport.blend](https://archive.blender.org/developer/F6919231/SpecularBugReport.blend) [2019-04-08_10-42-49.mp4](https://archive.blender.org/developer/F6919236/2019-04-08_10-42-49.mp4)

Alyx Wayland commented

2019-04-08 16:48:05 +02:00

Added subscriber: @Purrspctiv

Sebastian Parborg commented

2019-04-09 19:02:54 +02:00

Added subscriber: @ZedDB

Clément Foucault was assigned by Sebastian Parborg

2019-04-09 19:02:54 +02:00

Sebastian Parborg commented

2019-04-09 19:02:54 +02:00

The issue here is that the clear coat won't work if the specular color is zero (pitch black) however the doc states that clear coat should add a completely white specular layer on top:
https://docs.blender.org/manual/en/dev/render/eevee/materials/nodes/specular_bsdf.html

The issue here is that the clear coat won't work if the specular color is zero (pitch black) however the doc states that clear coat should add a completely white specular layer on top: https://docs.blender.org/manual/en/dev/render/eevee/materials/nodes/specular_bsdf.html

blender-admin commented

2019-04-30 14:07:16 +02:00

This issue was referenced by 2445d5abc2

This issue was referenced by 2445d5abc269123cb0789cc16a5710c6577e9d20

Clément Foucault commented

2019-04-30 14:07:29 +02:00

Changed status from 'Open' to: 'Resolved'

Clément Foucault closed this issue

2019-04-30 14:07:29 +02:00

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Eevee Specular Shader's Clear Coat does not function #63393