DDS Normal maps not rendering for certain DDS versions #56248

New Issue

Geoff Gerber · 2018-08-06T01:06:06+02:00

Geoff Gerber commented

2018-08-06 01:06:06 +02:00

System Information
Win10, Nvidia 970

Blender Version
Broken: 2.79b (I haven't tested on previous versions, but this has been an issue I've run into for a while.)

Summary:
When using a normal map from some DDS files, Blender can display the image fine in UV/Image Editor, but when plugged into a normal map node, the normals don’t show. If you take that DDS file and open/resave in GIMP, the normals do show. If you take that DDS file and pack it into the project, the normals also work properly.

Steps to reproduce:

Extract the linked Blend file, which contains a simple cube and node layout.
Set the view port to rendered mode.
Attach the brick_a_ddn-gimp.ddsImage Texture node to the Separate RGB node (DDS mixes up R and G for normals). The rendered image should show some nice pretty normals.
Attach the brick_a_ddn-orig.dds (ATI2 DDS File) Image Texture node to the Separate RGB node. The normals disappear, and you just see a flat surface on the cube.
Pack the brick_a_ddn-orig.dds into the project (UV/Image editor, open the brick_a_ddn-orig.dds file, and go Image -> Pack Image).
Refresh the viewport, and poof, you have normals again.

Also attached is a tif file converted from the orig DDS, which also works properly.

So while I have a workaround to get by this issue, it’s not ideal. I’m setting up a texture library, and don’t want to have to muddle with the original files to make them work properly. Nor do I want to pack all the images into the Blend file, since if I want to modify the textures in the future, it won’t apply to all the existing Blend files.

Blend file (zipped)

DDSIssue.zip

**System Information** Win10, Nvidia 970 **Blender Version** Broken: 2.79b (I haven't tested on previous versions, but this has been an issue I've run into for a while.) **Summary:** When using a normal map from some DDS files, Blender can display the image fine in UV/Image Editor, but when plugged into a normal map node, the normals don’t show. If you take that DDS file and open/resave in GIMP, the normals do show. If you take that DDS file and pack it into the project, the normals also work properly. **Steps to reproduce:** - Extract the linked Blend file, which contains a simple cube and node layout. - Set the view port to rendered mode. - Attach the brick_a_ddn-gimp.ddsImage Texture node to the Separate RGB node (DDS mixes up R and G for normals). The rendered image should show some nice pretty normals. - Attach the brick_a_ddn-orig.dds (ATI2 DDS File) Image Texture node to the Separate RGB node. The normals disappear, and you just see a flat surface on the cube. - Pack the brick_a_ddn-orig.dds into the project (UV/Image editor, open the brick_a_ddn-orig.dds file, and go Image -> Pack Image). - Refresh the viewport, and poof, you have normals again. Also attached is a tif file converted from the orig DDS, which also works properly. So while I have a workaround to get by this issue, it’s not ideal. I’m setting up a texture library, and don’t want to have to muddle with the original files to make them work properly. Nor do I want to pack all the images into the Blend file, since if I want to modify the textures in the future, it won’t apply to all the existing Blend files. [Blend file (zipped) ](https://1drv.ms/u/s!Ahz_oM1_DqLRg7R3gjfm1FFAKunEFA) [DDSIssue.zip](https://archive.blender.org/developer/F4133316/DDSIssue.zip)

Geoff Gerber commented

2018-08-06 01:06:06 +02:00

Added subscriber: @Geoffrey-Gerber

Bastien Montagne commented

2018-08-06 09:02:54 +02:00

Added subscribers: @brecht, @mont29

Brecht Van Lommel was assigned by Bastien Montagne

2018-08-06 09:02:54 +02:00

Bastien Montagne commented

2018-08-06 09:02:54 +02:00

That’s probably and OIIO library issue, @brecht?

Brecht Van Lommel was unassigned by Dalai Felinto

2019-12-23 16:36:03 +01:00

mike commented

2021-09-13 00:40:26 +02:00

Added subscriber: @kosblend

Philipp Oeser removed the

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DDS Normal maps not rendering for certain DDS versions #56248