FBX Exporter: Incorrect 'Type' field in material 'Mapping' node #96858

New Issue

Felix Herbst · 2022-03-29T17:20:03+02:00

Felix Herbst commented

2022-03-29 17:20:03 +02:00

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3060 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15

Blender Version
Broken: version: 3.1.0, branch: master, commit date: 2022-03-08 18:16, hash: blender/blender@c77597cd0e

Short description of error
Export and import a FBX with a simple material with a texture mapping results in incorrect tiling as the Mapping type is set to "Texture" instead of "Point" (the default).

After importing the FBX:

Expected:	Result:

NOTE: Analyzing other softwares, the same result of the texture mapping is verified after importing the file. This indicates that the problem is in the exporter.

NOTE: Switching type to "Texture" and adjusting the values to 0.1,0.1,0.1 is a workaround but should not be required.

If I'm not mistaken this needs to be fixed in export_fbx_bin.py:fbx_data_texture_file_elements:1432,
elem_props_template_set(tmpl, props, "p_vector_3d", b"Scaling", (((1.0 / s) if s != 0.0 else 1.0) for s in tex.scale))
might need to take the mapping type into account.

For reference, glTF seems to do that in gltf2_blender_get.py:get_texture_transform_from_mapping_node and takes TEXTURE, POINT and VECTOR into account for calculating the texture transform.

Exact steps for others to reproduce the error

Open attached file or:
- Create a cube
- Add a material
- Add a texture to Base Color
- Add a UV Map node and a Mapping node, note the default type is "Point"
- Set Scale to 10,10,10
Export as FBX with embedded textures
Open a separate Blender instance
Import the FBX
Note that the resulting texture tiling is effectively "inverted"

For reference:

Export as GLB
import the glTF
Note that the result is correct

Attached files:

CubeWithTiling.blend

**System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3060 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15 **Blender Version** Broken: version: 3.1.0, branch: master, commit date: 2022-03-08 18:16, hash: `blender/blender@c77597cd0e` **Short description of error** Export and import a FBX with a simple material with a texture mapping results in incorrect tiling as the Mapping type is set to "Texture" instead of "Point" (the default). After importing the FBX: |Expected:|Result: | -- | -- | |![image.png](https://archive.blender.org/developer/F12954172/image.png)|![image.png](https://archive.blender.org/developer/F12954184/image.png) NOTE: Analyzing other softwares, the same result of the texture mapping is verified after importing the file. This indicates that the problem is in the exporter. NOTE: Switching type to "Texture" and adjusting the values to 0.1,0.1,0.1 is a workaround but should not be required. If I'm not mistaken this needs to be fixed in `export_fbx_bin.py:fbx_data_texture_file_elements:1432`, `elem_props_template_set(tmpl, props, "p_vector_3d", b"Scaling", (((1.0 / s) if s != 0.0 else 1.0) for s in tex.scale))` might need to take the mapping type into account. For reference, glTF seems to do that in `gltf2_blender_get.py:get_texture_transform_from_mapping_node` and takes TEXTURE, POINT and VECTOR into account for calculating the texture transform. **Exact steps for others to reproduce the error** - Open attached file or: - Create a cube - Add a material - Add a texture to Base Color - Add a UV Map node and a Mapping node, note the default type is "Point" - Set Scale to 10,10,10 - Export as FBX with embedded textures - Open a separate Blender instance - Import the FBX Note that the resulting texture tiling is effectively "inverted" For reference: - Export as GLB - import the glTF Note that the result is correct **Attached files:** ![close-up-of-walking-cat-flip-2019_cc-by-20.jpg](https://archive.blender.org/developer/F12954175/close-up-of-walking-cat-flip-2019_cc-by-20.jpg) [CubeWithTiling.blend](https://archive.blender.org/developer/F12954176/CubeWithTiling.blend)

Felix Herbst commented

2022-03-29 17:20:03 +02:00

Added subscriber: @herbst

Germano Cavalcante changed title from ~~Exporting FBX with Mapping node set to "Point" exports incorrect texture tiling~~ to Importing an exported FBX with 'Vector Mapping' node set to "Point" results in incorrect texture Mapping

2022-03-30 20:27:04 +02:00

Germano Cavalcante commented

2022-03-30 20:28:15 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-03-30 20:28:15 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Germano Cavalcante commented

2022-03-30 20:28:15 +02:00

Thanks for the report. I edited the description to be a little clearer.

Felix Herbst commented

2022-03-30 21:01:21 +02:00

In #96858#1332488, @mano-wii wrote:
Thanks for the report. I edited the description to be a little clearer.

Thank you. Out of curiosity, why did you remove my remarks about this being an export bug (instead of an import bug)?

> In #96858#1332488, @mano-wii wrote: > Thanks for the report. I edited the description to be a little clearer. Thank you. Out of curiosity, why did you remove my remarks about this being an export bug (instead of an import bug)?

Germano Cavalcante commented

2022-03-30 21:09:59 +02:00

In #96858#1332540, @herbst wrote:
Thank you. Out of curiosity, why did you remove my remarks about this being an export bug (instead of an import bug)?

The message was a little confusing. I read that it was "verified that the import is correct ... in external softwares", but now looking back I see that I got it wrong. I will edit.

> In #96858#1332540, @herbst wrote: > Thank you. Out of curiosity, why did you remove my remarks about this being an export bug (instead of an import bug)? The message was a little confusing. I read that it was "verified that the _import_ is correct ... in external softwares", but now looking back I see that I got it wrong. I will edit.

Germano Cavalcante changed title from ~~Importing an exported FBX with 'Vector Mapping' node set to "Point" results in incorrect texture Mapping~~ to FBX Exporter: Incorrect 'Type' field in material 'Mapping' node

2022-03-30 21:16:59 +02:00

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FBX Exporter: Incorrect 'Type' field in material 'Mapping' node #96858