XnView Software

Posted: **Sun Jul 27, 2025 11:45 am**

title says it all:

PNG file with alpha channel shows up perfectly in viewer but thumnails look like alphachannel is ignored and actually messing up the graphics.

can't provide a file at the moment due to company logo rights.

: CC thumbs.jpg (38.28 KiB) Viewed 35 times

: creditcards.png (3.17 KiB) Viewed 35 times

Here a GIF. I don't think it has an alpha channel:

: amex thumb.jpg (196.38 KiB) Viewed 35 times

: amexco.gif (25.76 KiB) Viewed 35 times

Posted: **Wed Jul 30, 2025 3:31 pm**

no problem here, which thumbnail size do you use? and what do you have in settings>Thumbnail?

Posted: **Thu Jul 31, 2025 12:01 am**

Maybe because thumbnail is larger than the original?

xnview wrote: Wed Jul 30, 2025 3:31 pm no problem here, which thumbnail size do you use? and what do you have in settings>Thumbnail?

: Screenshot 2025-07-31 at 01.59.27.png (103.67 KiB) Viewed 21 times

: Screenshot 2025-07-31 at 01.59.40.png (87.8 KiB) Viewed 21 times

Posted: **Thu Jul 31, 2025 12:18 pm**

XnSoldier wrote: Thu Jul 31, 2025 12:01 am Maybe because thumbnail is larger than the original?

there is no embedded thumbnail

do you use windows font scaling?

XnView Software

1.9.2 Mac: Thumbs corrupted for GIFs and PNGs with alpha channel

1.9.2 Mac: Thumbs corrupted for GIFs and PNGs with alpha channel

Re: 1.9.2 Mac: Thumbs corrupted for GIFs and PNGs with alpha channel

Re: 1.9.2 Mac: Thumbs corrupted for GIFs and PNGs with alpha channel

Re: 1.9.2 Mac: Thumbs corrupted for GIFs and PNGs with alpha channel