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Maniphest T79248

FBX exporter does not embed normal map
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Description

System Information
Operating system: Linux Mint 19.3
Graphics card: Nvidia GTX 1080

Blender Version
Broken: 2.83.3, blender-2.90.0-9cbf43801ba2-linux64, blender-2.91.0-698af2e774b5-linux64, 2.82a, 2.81a, 2.80
Worked: ?

Short description of error
When exporting a model that has a normal map using the FBX exporter, it does not get embedded like the other textures.
Weird thing is that I have a fbx model with an embedded normal map. I made it with some 2.8x version. This makes me think that the issue does not always happen.

Exact steps for others to reproduce the error

  1. Add normal map to a material or use example
    simple_example.zip1 MBDownload
  2. export as FBX with embedded textures (set "Path mode" to "Copy" and tick the little box next to it)
  3. check if the texture is there in an external application or by reimporting into blender (keep in mind that blender will not apply the texture. it is available in the texture dropdown)

Event Timeline

Julian (MotoFckr9k) created this task.Jul 25 2020, 12:03 AM
Julian (MotoFckr9k) added a comment.Jul 26 2020, 11:22 AM

While the normal map shows when just connecting it directly to the normal input. For proper exporting the normal map need to be connected to a normal map node which connects to the normal map input.

Which means that while this is somewhat weird behavior, the main issue was me using it wrong;
So this issue can be closed.

Julian (MotoFckr9k) added a comment.Jul 26 2020, 11:27 AM

Though someone should probably still check if this is intended behavior, as the glTF exporter does embed the normal map under those circumstances.

Germano Cavalcante (mano-wii) closed this task as Archived.Jul 28 2020, 4:21 PM
Germano Cavalcante (mano-wii) claimed this task.
Germano Cavalcante (mano-wii) added a subscriber: Germano Cavalcante (mano-wii).
In T79248#985234, @Julian (MotoFckr9k) wrote:

While the normal map shows when just connecting it directly to the normal input. For proper exporting the normal map need to be connected to a normal map node which connects to the normal map input.

Which means that while this is somewhat weird behavior, the main issue was me using it wrong;
So this issue can be closed.

I understand that it can be confusing.
There is a large list of ToDos for FBX. Areas like these will improve over time.

Closing...