Collada export, does not take "diffuse" value from material's 'base color' when nodes are disabled #69090

New Issue

Gilles Gagnon · 2019-08-23T16:32:02+02:00

Gilles Gagnon commented

2019-08-23 16:32:02 +02:00

System Information
Operating system: WIN 10
Graphics card: Quadro P1000

Blender Version
Broken: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: f6cb5f5449, type:
build date: 2019-07-29, 09:44 AM
Worked: 2.79b

Assigning a material with color directly to faces in 2.80 and exporting it as a .DAE (Collada) works fine.

Assigning a material with color from a library (Material Library VX add-on) and exporting the file as a .DAE (Collada) doesn't work. The color doesn't get assigned to the "diffuse" property.

Exact steps for others to reproduce the error

I apologize if I'm repeating a known bug (I did try to search). I am also not a programmer and am using Blender for the first time, so pardon any mistakes in nomenclature or process...

Here is a .Blend file of a cube colored with a material created from scratch:

Direct_red.blend

Here is a .Blend file of a cube colored with a material from a library (I hope the file contains the info?):

Library_red.blend

Open the Direct_red.Blend. Export to .DAE. Import this DAE and notice the color is correct.
Open the Library_red.Blend. Export to .DAE. Import this DAE and notice the color is default.

**System Information** Operating system: WIN 10 Graphics card: Quadro [P1000](https://archive.blender.org/developer/P1000.txt) **Blender Version** Broken: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: f6cb5f54494e, type: build date: 2019-07-29, 09:44 AM Worked: 2.79b Assigning a material with color directly to faces in 2.80 and exporting it as a .DAE (Collada) works fine. ![Direct Red DAE XML.PNG](https://archive.blender.org/developer/F7694314/Direct_Red_DAE_XML.PNG) Assigning a material with color from a library (Material Library VX add-on) and exporting the file as a .DAE (Collada) doesn't work. The color doesn't get assigned to the "diffuse" property. ![Library Red DAE XML.PNG](https://archive.blender.org/developer/F7694318/Library_Red_DAE_XML.PNG) **Exact steps for others to reproduce the error** I apologize if I'm repeating a known bug (I did try to search). I am also not a programmer and am using Blender for the first time, so pardon any mistakes in nomenclature or process... Here is a .Blend file of a cube colored with a material created from scratch: [Direct_red.blend](https://archive.blender.org/developer/F7694330/Direct_red.blend) Here is a .Blend file of a cube colored with a material from a library (I hope the file contains the info?): [Library_red.blend](https://archive.blender.org/developer/F7694334/Library_red.blend) 1) Open the Direct_red.Blend. Export to .DAE. Import this DAE and notice the color is correct. 2) Open the Library_red.Blend. Export to .DAE. Import this DAE and notice the color is default.

Gilles Gagnon commented

2019-08-23 16:32:02 +02:00

Added subscriber: @ggagnon

Jacques Lucke commented

2020-01-21 15:31:19 +01:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2020-01-21 15:31:19 +01:00

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

Jacques Lucke commented

2020-01-21 15:31:19 +01:00

I can reproduce the issue. The issue is probably that only the node tree is evaluated to figure out the diffuse color. In the second file, the node tree has not been created yet. For me it works after I clicked on "Use Nodes".

@ggagnon can you confirm that this is the issue you describe?

I can reproduce the issue. The issue is probably that only the node tree is evaluated to figure out the diffuse color. In the second file, the node tree has not been created yet. For me it works after I clicked on "Use Nodes". ![image.png](https://archive.blender.org/developer/F8292057/image.png) @ggagnon can you confirm that this is the issue you describe?

Gilles Gagnon commented

2020-01-21 15:47:24 +01:00

I am not entirely sure what you are asking, so I tried:

Assigned a material library color to the default cube and exported to .DAE. Then I re-imported the DAE, clicked on 'use nodes' and the color is still not correct.

Assigned a material library color to the default cube when 'use node' (I think this actually turns it off (bar goes grey) is selected and exported to .DAE. Then I re-imported the DAE and the color is still not correct, regardless of whether I click on 'use nodes' or not.

I am not entirely sure what you are asking, so I tried: Assigned a material library color to the default cube and exported to .DAE. Then I re-imported the DAE, clicked on 'use nodes' and the color is still not correct. Assigned a material library color to the default cube when 'use node' (I think this actually turns it off (bar goes grey) is selected and exported to .DAE. Then I re-imported the DAE and the color is still not correct, regardless of whether I click on 'use nodes' or not.

Jacques Lucke commented

2020-01-21 15:59:27 +01:00

Open library_red.blend.
Click on Use Nodes in the material panel as shown in the screenshot above.
Export the cube with Collada.
Open a new file and import the just exported file.

In my case, the newly imported cube is red.

Maybe I understand the problem incorrectly,

1. Open `library_red.blend`. 2. Click on `Use Nodes` in the material panel as shown in the screenshot above. 3. Export the cube with Collada. 4. Open a new file and import the just exported file. In my case, the newly imported cube is red. Maybe I understand the problem incorrectly,

Gilles Gagnon commented

2020-01-21 16:25:53 +01:00

OK!

When I open Blender 2.8 with the default cube, and click on Surfaces, "Use Nodes" is ON.
I scroll down to my material library and refresh it to pop up my color presets, "Use Nodes" is ON.
I select my color preset, "Use Nodes" is still ON.
I assign my color preset to the cube, "Use Nodes" turns OFF by itself.

At which point, I would export to Collada and never think to go turn what was ON and turned itself OFF, back to ON. Not that I even knew "Use Nodes" was an option before submitting this ticket. I'm completely new to Blender.

Now, our CAD software outputs .STL files, which we have to painstakingly paint in Blender and save as Collada (.DAE) because Collada files actually save color info, where .STL files do not.

So I have to ask, what is the point of EVER allowing Collada files to save without the color info, ie: with "Use Nodes" turned OFF?

That being said, I suspect that our Material Library file just needs to be saved with "Use Nodes" turned on? This material library file was created in Blender 2.79b and I had the misfortune of trying to use it in Blender 2.8. I will try it.

OK! - When I open Blender 2.8 with the default cube, and click on Surfaces, "Use Nodes" is ON. - I scroll down to my material library and refresh it to pop up my color presets, "Use Nodes" is ON. - I select my color preset, "Use Nodes" is still ON. - I assign my color preset to the cube, "Use Nodes" turns OFF by itself. At which point, I would export to Collada and never think to go turn what was ON and turned itself OFF, back to ON. Not that I even knew "Use Nodes" was an option before submitting this ticket. I'm completely new to Blender. Now, our CAD software outputs .STL files, which we have to painstakingly paint in Blender and save as Collada (.DAE) because Collada files actually save color info, where .STL files do not. So I have to ask, what is the point of EVER allowing Collada files to save without the color info, ie: with "Use Nodes" turned OFF? That being said, I suspect that our Material Library file just needs to be saved with "Use Nodes" turned on? This material library file was created in Blender 2.79b and I had the misfortune of trying to use it in Blender 2.8. I will try it.

Jacques Lucke commented

2020-01-21 16:31:23 +01:00

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

Jacques Lucke commented

2020-01-21 16:31:23 +01:00

So I have to ask, what is the point of EVER allowing Collada files to save without the color info, ie: with "Use Nodes" turned OFF?

That is a bug, actually. I was just making sure that we are talking about the same thing.

If "Use Nodes" is disabled, the written color information should be taken from the object color.

> So I have to ask, what is the point of EVER allowing Collada files to save without the color info, ie: with "Use Nodes" turned OFF? That is a bug, actually. I was just making sure that we are talking about the same thing. If "Use Nodes" is disabled, the written color information should be taken from the object color.

Gilles Gagnon commented

2020-01-21 16:32:52 +01:00

Hmm..

I open my material library file with Blender 2.8, located at:

C:\Program Files\Blender Foundation\Blender\2.80\scripts\addons\materials_library_vx\

"Use Nodes" is turned OFF (as expected, from above).

I turn "Use Nodes" ON and then try to save under a different file name.

Blender crashes...ICOR_1.1.blend

The attached file is the Material Library created under Blender 2.79b

Hmm.. I open my material library file with Blender 2.8, located at: C:\Program Files\Blender Foundation\Blender\2.80\scripts\addons\materials_library_vx\ "Use Nodes" is turned OFF (as expected, from above). I turn "Use Nodes" ON and then try to save under a different file name. Blender crashes...[ICOR_1.1.blend](https://archive.blender.org/developer/F8292135/ICOR_1.1.blend) The attached file is the Material Library created under Blender 2.79b

Gilles Gagnon commented

2020-01-21 16:34:00 +01:00

In #69090#855102, @JacquesLucke wrote:

So I have to ask, what is the point of EVER allowing Collada files to save without the color info, ie: with "Use Nodes" turned OFF?

That is a bug, actually. I was just making sure that we are talking about the same thing.

If "Use Nodes" is disabled, the written color information should be taken from the object color.

Oh, OK. Sorry for the passive aggression.

> In #69090#855102, @JacquesLucke wrote: >> So I have to ask, what is the point of EVER allowing Collada files to save without the color info, ie: with "Use Nodes" turned OFF? > > That is a bug, actually. I was just making sure that we are talking about the same thing. > > If "Use Nodes" is disabled, the written color information should be taken from the object color. Oh, OK. Sorry for the passive aggression.

Bastien Montagne changed title from ~~Collada export, "diffuse" not being assigned color when material assigned from a library~~ to Collada export, does not take "diffuse" value from material's 'base color' when nodes are disabled

2020-01-22 09:49:07 +01:00

Gaia Clary was assigned by Bastien Montagne

2020-01-22 09:49:07 +01:00

blender-admin commented

2020-01-22 18:00:33 +01:00

This issue was referenced by 8fc68a2e9c

This issue was referenced by 8fc68a2e9cf1d983b3d249988ab05905bd24f06f

Gaia Clary commented

2020-01-22 18:04:26 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Gaia Clary closed this issue

2020-01-22 18:04:26 +01:00

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Collada export, does not take "diffuse" value from material's 'base color' when nodes are disabled #69090