Light color and color from the node interfere with each other #68361

New Issue

Yegor · 2019-08-07T13:43:55+02:00

Yegor commented

2019-08-07 13:43:55 +02:00

System Information
Operating system: Linux-3.10.0-957.10.1.el7.x86_64-x86_64-with-centos-7.6.1810-Core 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 418.56

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: f6cb5f5449
Worked: 2.79 any

Short description of error
When you create a light there is a color attribute on it and the Use nodes button. Hitting that button creates a node setup with the emission shader which also has color. Those two color attributes affect each other mixing somehow.
Why do we ever want a light without nodes? 2.79 creates nodes right away and the default color attribute disappears. If you'd like to disable nodes, then emission color disappears and the default color attribute comes in play.

Exact steps for others to reproduce the error
Open the attached file.
blender_ligths_color_bug.blend

Here's the screenshot as well.

**System Information** Operating system: Linux-3.10.0-957.10.1.el7.x86_64-x86_64-with-centos-7.6.1810-Core 64 Bits Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 418.56 **Blender Version** Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: `f6cb5f5449` Worked: 2.79 any **Short description of error** When you create a light there is a color attribute on it and the Use nodes button. Hitting that button creates a node setup with the emission shader which also has color. Those two color attributes affect each other mixing somehow. Why do we ever want a light without nodes? 2.79 creates nodes right away and the default color attribute disappears. If you'd like to disable nodes, then emission color disappears and the default color attribute comes in play. **Exact steps for others to reproduce the error** Open the attached file. [blender_ligths_color_bug.blend](https://archive.blender.org/developer/F7652858/blender_ligths_color_bug.blend) Here's the screenshot as well. ![light_color_bug.png](https://archive.blender.org/developer/F7652856/light_color_bug.png)

Yegor commented

2019-08-07 13:43:55 +02:00

Added subscriber: @YegorSmirnov

Yevgeny Makarov commented

2019-08-07 16:12:47 +02:00

Added subscriber: @jenkm

Yevgeny Makarov commented

2019-08-07 16:12:47 +02:00

#65859 Lamp data color not replaced when using nodes in cycles

Yegor commented

2019-08-07 16:19:15 +02:00

Ok, what's the idea behind mixing two colors? How can it be useful, besides the confusion it makes?

Jacques Lucke commented

2019-08-07 16:50:31 +02:00

Added subscriber: @brecht

Demeter Dzadik commented

2019-08-08 23:17:08 +02:00

Added subscriber: @Mets

Demeter Dzadik commented

2019-08-08 23:17:08 +02:00

I think Yevgeny is just pointing out that this may be a duplicate, and according to that other report it is by design.

I also find it odd though. This mixing behaviour is only present in Cycles, whereas Eevee ignores the node setup. I'm sure there's a good reason why this is done the way it is though, but it does seem unfortunate, and makes little sense to me.

I think Yevgeny is just pointing out that this may be a duplicate, and according to that other report it is by design. I also find it odd though. This mixing behaviour is only present in Cycles, whereas Eevee ignores the node setup. I'm sure there's a good reason why this is done the way it is though, but it does seem unfortunate, and makes little sense to me.

Brecht Van Lommel commented

2019-08-10 03:44:31 +02:00

Closed as duplicate of #65859

Brecht Van Lommel closed this issue

2019-08-10 03:44:31 +02:00

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Light color and color from the node interfere with each other #68361