colored smoke doesn't work (cycles blender 2.80) #60209

New Issue

Kobe Reygel · 2019-01-05T19:44:34+01:00

Kobe Reygel commented

2019-01-05 19:44:34 +01:00

System Information
Operating system: mac OS
Graphics card: not useful (CPU rendering)

Blender Version
Broken:

2.80, a77b63c569, blender2.8, 2019-01-04
Worked: (optional) in blender 2.79b

Short description of error
Setting a color to a smoke flow object still renders the default, gray color. Error occurs in viewport, as well as in actual render after baking.

Exact steps for others to reproduce the error
set render engine to cycles
apply quick effect: smoke to default cube
select cube, go to physics tab
change smoke color

**System Information** Operating system: mac OS Graphics card: not useful (CPU rendering) **Blender Version** Broken: 2.80, a77b63c56943, blender2.8, 2019-01-04 Worked: (optional) in blender 2.79b **Short description of error** Setting a color to a smoke flow object still renders the default, gray color. Error occurs in viewport, as well as in actual render after baking. **Exact steps for others to reproduce the error** set render engine to cycles apply quick effect: smoke to default cube select cube, go to physics tab change smoke color

Kobe Reygel commented

2019-01-05 19:44:34 +01:00

Added subscriber: @Arkay

Sebastian Parborg commented

2019-01-25 13:20:17 +01:00

Added subscribers: @brecht, @ZedDB

Brecht Van Lommel was assigned by Sebastian Parborg

2019-01-25 13:20:17 +01:00

Sebastian Parborg commented

2019-01-25 13:20:17 +01:00

This is because Quick Smoke does not set the smoke shader color attribute to color (so the color is not read from the smoke setting). It is instead read from the shader node.

I'm guessing this is not the intended behavior @brecht ?

This is because `Quick Smoke` does not set the smoke shader color attribute to `color` (so the color is not read from the smoke setting). It is instead read from the shader node. I'm guessing this is not the intended behavior @brecht ?

Brecht Van Lommel commented

2019-01-25 14:04:04 +01:00

Changed status from 'Open' to: 'Archived'

Brecht Van Lommel closed this issue

2019-01-25 14:04:04 +01:00

Brecht Van Lommel commented

2019-01-25 14:04:04 +01:00

It's intentionally not using the color by default, for performance reasons.

Ideally we could detect automatically if using the color is needed or if it's a fixed value, but until that is done it is too much of a performance / memory usage to use the smoke color. It's much more efficient to tweak the color in the shader.

It's intentionally not using the color by default, for performance reasons. Ideally we could detect automatically if using the color is needed or if it's a fixed value, but until that is done it is too much of a performance / memory usage to use the smoke color. It's much more efficient to tweak the color in the shader.

Kobe Reygel commented

2019-01-25 14:23:20 +01:00

Fair enough, but I feel like it's kinda weird that the option is there in plain sight, if it doesn't map by default.
@ZedDB you seem knowledgeable, can I ask you how I do map the smoke color attribute to the color?

I could just change the shader color, but that changes all smoke in the domain to a monochrome color. I want to have multiple objects emitting different colors, and do stuff like keymapping the emitted color to make cool effects.
(If this is not a suitable place to ask this, then I apologize, and would love being pointed to the right place to ask.)

Fair enough, but I feel like it's kinda weird that the option is there in plain sight, if it doesn't map by default. @ZedDB you seem knowledgeable, can I ask you how I do map the smoke color attribute to the color? I could just change the shader color, but that changes all smoke in the domain to a monochrome color. I want to have multiple objects emitting different colors, and do stuff like keymapping the emitted color to make cool effects. (If this is not a suitable place to ask this, then I apologize, and would love being pointed to the right place to ask.)

Sebastian Parborg commented

2019-01-25 14:46:40 +01:00

In the domain shader, simply type in color in the Color Attribute slot

In the domain shader, simply type in `color` in the `Color Attribute` slot

Chris Camargo commented

2019-02-11 03:20:28 +01:00

Added subscriber: @chriscamargo

Chris Camargo commented

2019-02-11 03:20:28 +01:00

I'm a little confused. Does this mean that in Blender 2.8, we can no longer animate the smoke color to change as it's emitted while using Cycles as the renderer?

I was following along with a smoke tutorial here but in 2.8, the smoke no longer renders using the expected colors. As @Arkay mentioned, changing the shader color changes the smoke wholesale. Is there another way to do this in 2.8 that will still allow me to animate smoke colors from a single emitter?

I'm a little confused. Does this mean that in Blender 2.8, we can no longer animate the smoke color to change as it's emitted while using Cycles as the renderer? I was following along with a [smoke tutorial here ](https://www.youtube.com/watch?v=VmRqlsuSvsw&t=242s) but in 2.8, the smoke no longer renders using the expected colors. As @Arkay mentioned, changing the shader color changes the smoke wholesale. Is there another way to do this in 2.8 that will still allow me to animate smoke colors from a single emitter?

Kobe Reygel commented

2019-02-11 10:36:43 +01:00

@chriscamargo you can! Like Sebastian said above, go to the smoke domain, go to its shader nodes, and type "color" in the box called "Color Attribute"

After doing this, the smoke behaved like it did in 2.79 again. (and thus being keymappable)

@chriscamargo you can! Like Sebastian said above, go to the smoke domain, go to its shader nodes, and type "color" in the box called "Color Attribute" After doing this, the smoke behaved like it did in 2.79 again. (and thus being keymappable)

Chris Camargo commented

2019-02-15 16:51:49 +01:00

Apologies, I didn't make the connection initially. Thank you, @Arkay and @ZedDB, that did the trick!

Timo commented

2019-03-06 23:00:54 +01:00

Added subscriber: @atf-productions

Timo commented

2019-03-06 23:00:54 +01:00

To animate the whole domain is not what is asked for. the emitter effect is something amazing different in Cycles where the emitting item can have changing color.

To animate the whole domain is not what is asked for. the emitter effect is something amazing different in Cycles where the emitting item can have changing color. ![screenshot - 2019_03_06 10-59-50.png](https://archive.blender.org/developer/F6774922/screenshot_-_2019_03_06_10-59-50.png)

Thomas Delord commented

2019-10-17 10:46:01 +02:00

Added subscriber: @theartdirector

Thomas Delord commented

2019-10-17 10:46:01 +02:00

Since Blender 2.80 "Smoke color" doesn't seams to work anymore (Cycles) for renders and animation… It appears grey in Cycles renders. Does someone here has the solution to fixe this ? I tried this way, using Nodes, but it changes the entire color of the smoke (right side of the video).

Blender - Smoke changing color 01.mov

Since Blender 2.80 "Smoke color" doesn't seams to work anymore (Cycles) for renders and animation… It appears grey in Cycles renders. Does someone here has the solution to fixe this ? I tried this way, using Nodes, but it changes the entire color of the smoke (right side of the video). [Blender - Smoke changing color 01.mov](https://archive.blender.org/developer/F7828911/Blender_-_Smoke_changing_color_01.mov)

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

colored smoke doesn't work (cycles blender 2.80) #60209