Collada export -> import materials don't work #43366

New Issue

Alberto Velázquez · 2015-01-22T12:44:15+01:00

2015-01-22 12:44:15 +01:00

System Information
Windows 7 64bits

Blender Version
Blender 2.73a

Short description of error
If I export a mesh with collada and import to blender the material and textures don't work and only import the specular texture. I have tried differents options to import/export, with lambert specular 0,...

Exact steps for others to reproduce the error
error.zip

**System Information** Windows 7 64bits **Blender Version** Blender 2.73a **Short description of error** If I export a mesh with collada and import to blender the material and textures don't work and only import the specular texture. I have tried differents options to import/export, with lambert specular 0,... **Exact steps for others to reproduce the error** [error.zip](https://archive.blender.org/developer/F138756/error.zip)

Alberto Velázquez commented

2015-01-22 12:44:15 +01:00

Changed status to: 'Open'

Alberto Velázquez commented

2015-01-22 12:44:15 +01:00

Added subscriber: @AlbertoVelazquez

Gaia Clary was assigned by Bastien Montagne

2015-01-22 13:19:11 +01:00

Julian Eisel commented

2015-01-22 14:16:12 +01:00

Added subscribers: @mont29, @JulianEisel

Julian Eisel commented

2015-01-22 14:16:12 +01:00

Works fine here. And again, I'd blame your graphics card (See your other reports).

@mont29 any reason why using BF Blender or was that done by accident?

Works fine here. And again, I'd blame your graphics card (See your other reports). @mont29 any reason why using BF Blender or was that done by accident?

Bastien Montagne commented

2015-01-22 14:38:12 +01:00

@JulianEisel Collada is BF-Blender (core C/C++ code), not addon! ;)

Alberto Velázquez commented

2015-01-23 10:43:42 +01:00

I will try to explain a few more the bug.

If you see the collada file you will see the problem exporting the file. For some reason the collada don't write properly the texture. In the example if I import the collada I obtain one box with one material with two textures with the same image file (spec.png). Instead of three textures (normal, difuse and spec)

This happens with a hundred of files of our proyect.

I will try to explain a few more the bug. If you see the collada file you will see the problem exporting the file. For some reason the collada don't write properly the texture. In the example if I import the collada I obtain one box with one material with two textures with the same image file (spec.png). Instead of three textures (normal, difuse and spec) This happens with a hundred of files of our proyect.

Saurabh Wankhade commented

2015-01-25 13:51:34 +01:00

Added subscriber: @SaurabhWankhade

Saurabh Wankhade commented

2015-01-25 14:02:33 +01:00

If in Normal texture Influence->Geometry->Normal is checked, the texture would be exported propertly,but will fail to import back properly.
so if you have any normal texture drag it down to the bottom, because while importing back it would stop importing from the point where normal map texture is encountered.
say the texture are in the order.

Diffuse
specular
Normal
Ambient

Then the ones that will be imported back will consist only of

Diffuse
specular

Textures after Normal and ambient wont import back in.

I will try to fix the Import Normal texture after later.

If in Normal texture **Influence->Geometry->Normal** is checked, the texture would be exported propertly,but will fail to import back properly. so if you have any normal texture drag it down to the bottom, because while importing back it would stop importing from the point where normal map texture is encountered. say the texture are in the order. - Diffuse - specular - Normal - Ambient Then the ones that will be imported back will consist only of - Diffuse - specular Textures after Normal and ambient wont import back in. I will try to fix the Import Normal texture after later.

Rob Baer commented

2015-02-01 04:52:07 +01:00

Added subscriber: @RobertBaer

Rob Baer commented

2015-02-01 04:52:07 +01:00

Windows 8.1 Blender 2.73 Collada Export/Import - Round trip

Steps to reprooduce
Load blend file with an image texture material
or an image texture material with also a normal map

Export from Blender as Collada file
Clear objects from scene and import the Collada file just exported
Note that the texture do not successfully make it round trip.

Verify that the round trip is successful if the objects are exported/imported as .obj

Related:
Import a .dae file created elsewhere (MakeHuman in my case) that has both a texture and a normal mapped material. Note that the texture map imports, but not the normal map. There also seem to be import errors related to the handling of transparency.

If any or all of this is a separate issue I can make a separate bug report.

Windows 8.1 Blender 2.73 Collada Export/Import - Round trip Steps to reprooduce Load blend file with an image texture material or an image texture material with also a normal map 2. Export from Blender as Collada file 3. Clear objects from scene and import the Collada file just exported 4. Note that the texture do not successfully make it round trip. Verify that the round trip is successful if the objects are exported/imported as .obj Related: Import a .dae file created elsewhere (MakeHuman in my case) that has both a texture and a normal mapped material. Note that the texture map imports, but not the normal map. There also seem to be import errors related to the handling of transparency. If any or all of this is a separate issue I can make a separate bug report.

Julian Eisel commented

2015-02-03 14:39:02 +01:00

So what's the status here? @SaurabhWankhade, any luck so far?

Saurabh Wankhade commented

2015-02-03 16:03:45 +01:00

@JulianEisel D1028 fixes wrong(spec color -> diff) mappping, need some one to verify, test and commit it.
@RobertBaer Transparency issue : already mentioned here #27161. Transparency value is exported to the collada file, but in the collada libs there is no way to access transparency(unless there is a workaround).. so it can be fixed only when libs are fixed.(See COLLADAFWEffectCommon.h, there is api for getting value from collada file like getShininess () etc., but not for transparency.. for some reason parts of code are commented out i.e. mTransparency, mTransparent)

@JulianEisel [D1028](https://archive.blender.org/developer/D1028) fixes wrong(spec color -> diff) mappping, need some one to verify, test and commit it. @RobertBaer Transparency issue : already mentioned here #27161. Transparency value is exported to the collada file, but in the collada libs there is no way to access transparency(unless there is a workaround).. so it can be fixed only when libs are fixed.(See COLLADAFWEffectCommon.h, there is api for getting value from collada file like getShininess () etc., but not for transparency.. for some reason parts of code are commented out i.e. mTransparency, mTransparent)

Saurabh Wankhade commented

2015-02-04 16:14:41 +01:00

Attaching test files..
file.tar.gz

Attaching test files.. [file.tar.gz](https://archive.blender.org/developer/F140969/file.tar.gz)

Alberto Velázquez commented

2015-02-04 16:36:55 +01:00

I have tested the test files with the actual version, 2.73a, and the last in the builder blender-2.73-1dddcfb-OSX-10.6-x86_64.zip. And in all the version I only obtain two textures, not three.

patched_normal_at_bottom > Normal map and Spec (in this order) with the normal map like a diffuse map
patched_normal_at_bottom_with_normal_enabled > Diffuse map and Spec
patched_original > Diffuse map and Spec

unpatched_normal_at_bottom > Normal map and Spec (in this order) with the normal map like a diffuse map
unpatched_normal_at_bottom_with_normal_enabled > Spec and spec, the first spec like a diffuse map
unpatched_original > Spec and spec, the first spec like a diffuse map

in other way, now OSX can read the diffuse texture in the preview of the file system in the patched versions, at least the diffuse.

I have tested the test files with the actual version, 2.73a, and the last in the builder blender-2.73-1dddcfb-OSX-10.6-x86_64.zip. And in all the version I only obtain two textures, not three. patched_normal_at_bottom > Normal map and Spec (in this order) with the normal map like a diffuse map patched_normal_at_bottom_with_normal_enabled > Diffuse map and Spec patched_original > Diffuse map and Spec unpatched_normal_at_bottom > Normal map and Spec (in this order) with the normal map like a diffuse map unpatched_normal_at_bottom_with_normal_enabled > Spec and spec, the first spec like a diffuse map unpatched_original > Spec and spec, the first spec like a diffuse map in other way, now OSX can read the diffuse texture in the preview of the file system in the patched versions, at least the diffuse.

Saurabh Wankhade commented

2015-02-04 16:58:17 +01:00

@AlbertoVelazquez : the patch is not yet commited, so it wont show up in the nightly build. :)
patched_normal_at_bottom -> The name "normal map" has color enabled(and not the normal mapping), so it is exported as diffuse texture.
patched_normal_at_bottom_with_normal_enabled -> "normal map" wont load, bug.

@AlbertoVelazquez : the patch is not yet commited, so it wont show up in the nightly build. :) patched_normal_at_bottom -> The name "normal map" has color enabled(and not the normal mapping), so it is exported as diffuse texture. patched_normal_at_bottom_with_normal_enabled -> "normal map" wont load, bug.

Alberto Velázquez commented

2015-02-04 17:01:18 +01:00

@SaurabhWankhade I suppose that, anyway I want test it and tell the results if this wasn't be the case.