DDS file Thumbnails in Windows 11

[Bluegunk]

Can anyone tell me why some thumbnails render, and others do not?  I use Paintnet as the default DDS viewer and I read that it should render the Win 11 thumbs satisfactorily.

 

[traison]

Use texdiag on a working and broken texture. Compare the differences. If the format, miplevels, dimension and alpha mode are the same, I would assume it's a bug in the thumbnail renderer.

 

texdiag.exe info "path\to\screenshot1006.dds"

 

Edit: Also your screenshots kind a look like the ones in this bug. Unfortunately it was never answered.

Edited January 21 by traison

[Bluegunk]

Thank you Traison. I tried with texdiag but I just got a blank spot with its use. (Showing my age).

 

I just realised if I open the DDS in PaintNet and save it, the thumbnail works.  I'll do it that way.

 

Thanks!

[traison]

Send me one working and one broken screenshot before you mangle them all in Paint.Net?

[Bluegunk]

Here we go. The second one (by the pool) is the thumbnail problem.  These were all taken using the Photo Mode mod. Do you want a zip sent by pm?

 

 

Edited January 21 by Bluegunk

[traison]

15 minutes ago, Bluegunk said:

Do you want a zip sent by pm?

 

Yes because the images you linked are jpgs. Wrong format.

[Bluegunk]

OK... now that's weird because I posted them to the 3rd party as DDS. They're still in my 'upload folder' as DDS.  I'll send direct as a pm.

[traison]

.\Screenshot64.dds
        width = 3440
       height = 1440
        depth = 1
    mipLevels = 12
    arraySize = 1
       format = BC7_UNORM_SRGB
    dimension = 2D
   alpha mode = Unknown
       images = 12
   pixel size = 6451 (KB)

.\Screenshot65.dds
        width = 3440
       height = 1440
        depth = 1
    mipLevels = 1
    arraySize = 1
       format = BC7_UNORM
    dimension = 2D
   alpha mode = Unknown
       images = 1
   pixel size = 4837 (KB)

 

So either the thumbnail generator doesn't understand one of the formats, or it gets confused because of mipmaps. Incomplete featureset or bug. But there's the reason why it doesn't work sometimes anyways. Also this is the reason why I use the DDS tools provided by Microslop rather than Paint.NET. Trade convience for automation and consistency.

Edited January 21 by traison

[Bluegunk]

Thank you for explaining that to me. I know very, very little about texture formats. 

I don't have any DDS tools other that PaintNet and a DDS viewer (that crashes on the problem thumbnails.

 

Given I don't work with textures except when desperate, and I know they seem to be 'upgradable' using PaintNet, I'll use that programme if needed.

 

Thanks!