Thumbnails from .THM rendered with wrong colours

[fabrizio.giudici]

While they worked well before PhotoSupreme 2024, as you can see below (the small Preview window shows the .THM file) they recently started to be rendered with over-saturated, too contrasted and “cold” colours. I thought that it was related to the colour profile in the .THM files, but switching from Adobe RGB to sRGB doesn't fix the issue.

Screenshot 2024-05-28 at 14.16.40.jpg (368.68 KiB) Viewed 2801 times

[Hert]

Check if you enabled color management for thumbs/previews

Check the color profile in the metadata

Check if there are edits from a 3rd party tool (c1 cos file or Lightroom or DXO dop file)

[fabrizio.giudici]

I suppose it's "Color Mangement"/"Use color management to generate thumbnails (slows down)", right? It's enabled.

The embedded profile in the .THM is sRGB IEC61966-2.1 (checked with macOS Preview and exiftool).

The thumbnail is directly exported from Capture One (only renamed).