Baking normal maps with Cycles and Open Shading Language enabled is broken. #52371

New Issue

Michael Schmeling · 2017-08-12T19:29:20+02:00

Michael Schmeling commented

2017-08-12 19:29:20 +02:00

System Information
CPU: Intel i7 870 2.93 GHz
RAM: 16 GB
GFX: NVIDIA Geforce GT 420
OS: Windows 7 Home 64 bit
Drivers: NVIDIA 9.18.13.4752

Blender Version
Blender: 2.79c 5e9132b Release Candidate 2017-08-01 17:31

Short description of error
Baking normal maps with Cycles and Open Shading Language enabled gives blank normal map.

Exact steps for others to reproduce the error

Open the file OSLTest.blend
In the Render panel press 'Bake' (with bake type 'Normal') -> a correct normal map is baked.
Now enable 'Open Shading Language' in render settings.
Press 'Bake' again -> the normal map is rendered but remains blank. I guess this is a bug. (Note that the project does not actually use any OSL, checking the options is enough for the bug to appear.)

The same happens with Blender 2.78 (official)
OSLTest.blend

system-info.txt

**System Information** CPU: Intel i7 870 2.93 GHz RAM: 16 GB GFX: NVIDIA Geforce GT 420 OS: Windows 7 Home 64 bit Drivers: NVIDIA 9.18.13.4752 **Blender Version** Blender: 2.79c 5e9132b Release Candidate 2017-08-01 17:31 **Short description of error** Baking normal maps with Cycles and Open Shading Language enabled gives blank normal map. **Exact steps for others to reproduce the error** - Open the file OSLTest.blend - In the Render panel press 'Bake' (with bake type 'Normal') -> a correct normal map is baked. - Now enable 'Open Shading Language' in render settings. - Press 'Bake' again -> the normal map is rendered but remains blank. I guess this is a bug. (Note that the project does not actually use any OSL, checking the options is enough for the bug to appear.) The same happens with Blender 2.78 (official) [OSLTest.blend](https://archive.blender.org/developer/F708397/OSLTest.blend) [system-info.txt](https://archive.blender.org/developer/F708398/system-info.txt)

Michael Schmeling commented

2017-08-12 19:29:20 +02:00

Changed status to: 'Open'

Michael Schmeling commented

2017-08-12 19:29:20 +02:00

Added subscriber: @cgmike

Dalai Felinto commented

2017-08-29 10:41:30 +02:00

Added subscribers: @brecht, @dfelinto

Brecht Van Lommel was assigned by Dalai Felinto

2017-08-29 10:41:30 +02:00

Dalai Felinto commented

2017-08-29 10:41:30 +02:00

To be clear, OSL baking works fine. The issue is that "Displacement" normal map baking doesn't work with OSL.

For the records here is an example of normal map baking working fine when not using the displacement socket:

OSLTest2.blend

When you turn on OSL all the nodes are replaced by their OSL counterpart. Even if you are not using the (OSL) Script node.

@brecht do you have any clues on what is happening here? (original OSLTest.blend, not this OSLTest2.blend)

To be clear, OSL baking works fine. The issue is that "Displacement" normal map baking doesn't work with OSL. For the records here is an example of normal map baking working fine when not using the displacement socket: [OSLTest2.blend](https://archive.blender.org/developer/F738066/OSLTest2.blend) When you turn on OSL all the nodes are replaced by their OSL counterpart. Even if you are not using the (OSL) Script node. @brecht do you have any clues on what is happening here? (original OSLTest.blend, not this OSLTest2.blend)

Brecht Van Lommel commented

2017-08-31 02:35:32 +02:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2017-08-31 02:35:32 +02:00

Brecht Van Lommel commented

2017-08-31 02:35:32 +02:00

This was fixed as part of b5f8063fb9, it should work in the latest builds from https://builder.blender.org/download/.

This was fixed as part of b5f8063fb9, it should work in the latest builds from https://builder.blender.org/download/.

Dalai Felinto commented

2017-08-31 10:59:54 +02:00

I must have tried with an old Blender, my bad. Thanks brecht

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Baking normal maps with Cycles and Open Shading Language enabled is broken. #52371