gltf exporter put Bump texture into normal map channel #95857

New Issue

butaixianran · 2022-02-18T04:50:36+01:00

butaixianran commented

2022-02-18 04:50:36 +01:00

Blender Version

Broken:
3.0

Short description of error
When exporting glft file, material's Bump texture is not converted into normal map, it just set Bump texture as normal map, which won't work well.

Solution
Need to convert Bump texture into a new normal texture when exporting gltf.

Or, add an extension standard for bump map to gltf's repo as a "Vendor", like these:
https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Vendor

**Blender Version** Broken: 3.0 **Short description of error** When exporting glft file, material's Bump texture is not converted into normal map, it just set Bump texture as normal map, which won't work well. **Solution** Need to convert Bump texture into a new normal texture when exporting gltf. Or, add an extension standard for bump map to gltf's repo as a "Vendor", like these: https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Vendor

butaixianran commented

2022-02-18 04:50:36 +01:00

Added subscriber: @butaixianran

Julien Duroure commented

2022-02-18 10:08:51 +01:00

Added subscriber: @JulienDuroure

Julien Duroure commented

2022-02-18 10:08:51 +01:00

This action is on our TODO board :

Julien Duroure self-assigned this 2022-02-18 10:09:00 +01:00

Julien Duroure commented

2022-02-18 10:09:22 +01:00

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

Julien Duroure commented

2024-09-26 13:42:47 +02:00

Hello,
Closing this ticket, as there is already a ticket in upstream repository for that:
https://github.com/KhronosGroup/glTF-Blender-IO/issues/199

Hello, Closing this ticket, as there is already a ticket in upstream repository for that: https://github.com/KhronosGroup/glTF-Blender-IO/issues/199

Julien Duroure closed this issue

2024-09-26 13:42:48 +02:00

Blender Bot added

and removed

labels 2024-09-26 13:42:49 +02:00

butaixianran commented

2024-09-26 18:04:51 +02:00

You should not close this issue because of https://github.com/KhronosGroup/glTF-Blender-IO/issues/199.

That issue is from year 2018 and nobody has taken any move on that.

On the othe hand, I have already created a blender's python script to convert a bump map into normal map, It is open source, you can use it for this issue:
https://github.com/butaixianran/DazToBlender/blob/master/Blender/appdata_common/Blender%20Foundation/Blender/BLENDER_VERSION/scripts/addons/DFB/BumpToNormal.py

The function "bumpToNormal" is what you need.

Be noticed, it gonna take a long time to do this conversion.

You should not close this issue because of `https://github.com/KhronosGroup/glTF-Blender-IO/issues/199`. That issue is from year 2018 and nobody has taken any move on that. On the othe hand, I have already created a blender's python script to convert a bump map into normal map, It is open source, you can use it for this issue: [https://github.com/butaixianran/DazToBlender/blob/master/Blender/appdata_common/Blender%20Foundation/Blender/BLENDER_VERSION/scripts/addons/DFB/BumpToNormal.py](https://github.com/butaixianran/DazToBlender/blob/master/Blender/appdata_common/Blender%20Foundation/Blender/BLENDER_VERSION/scripts/addons/DFB/BumpToNormal.py) The function "bumpToNormal" is what you need. Be noticed, it gonna take a long time to do this conversion.

butaixianran reopened this issue

2024-09-26 18:04:53 +02:00

Blender Bot added

and removed

labels 2024-09-26 18:04:55 +02:00

Julien Duroure commented

2024-09-26 18:13:12 +02:00

Hello,

I am the maintainer of glTF-Blender-IO, that is the upstream repository of code provided in Blender (I copy every commit from glTF-Blender-IO to Blender).

So Blender is not the upstream repository, and not the reference tracker for issues.
I want to avoid having same ticket in both tracker, so I will close this one, as proposed in my previous message.

Thanks a lot for the link to your code, I will have a look.

Hello, I am the maintainer of glTF-Blender-IO, that is the upstream repository of code provided in Blender (I copy every commit from glTF-Blender-IO to Blender). So Blender is not the upstream repository, and not the reference tracker for issues. I want to avoid having same ticket in both tracker, so I will close this one, as proposed in my previous message. Thanks a lot for the link to your code, I will have a look.

Julien Duroure closed this issue

2024-09-26 18:13:14 +02:00

Blender Bot added

and removed

labels 2024-09-26 18:13:14 +02:00

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