Since I updated to 3.2, all lighttable views are lower-resolution on my 4K screen. I typically use the sticky preview (Alt-W) in the lighttable for culling, and it used to show a good rendition of the image in question.
In 3.2, however, I can see obvious stair cases on diagonals, and it has become very hard to judge focus. I believe the light table is rendering at less than my native 4K resolution.
Do you know if there is a setting that affects the lighttable’s rendering resolution?
Yes, there are several in the preferences window.
Could you tell me which one actually affects lighttable resolution? The only one I see that with a vaguely relevant name is “high quality thumb processing”, but this seems to have no effect.
I have since opened a Github issue describing the matter in more detail: Lighttable previews rendered at low resolution on 4K screen · Issue #5947 · darktable-org/darktable · GitHub
I’m observing the same effect, but using a standard HD screen (1920x1080). I experimented with several different settings for “high qualitythumb processing from size” without any impact. Furthermore I used darktable-create-cache -m 7 to create thumbs for all possible sizes without any impact as well.
The staircase effect is clearly visible at diagonal edges of high contrast. On low contrast images it is less obvious.
What is the maximal resolution we can get in lightable preview (pressing “W” with mouse cursor over image) and which parameter is controlling it ?