Full preview in low resolution

Hi all,
I am using dt 3.8.0 release on a macbook pro (pre-M1) and I noticed that when looking at full previews in lighttable (w or f key), the images don’t show at their full resolution but at a lower one (ie, they look pixelated and jagged). Is there a setting that must be configured to correct this (I couldn’t find it)?

thanks for any suggestion
giuseppe

Hi Giuseppe,
you might want to try and disable the setting “prefer performance over quality” in the general settings:


Not sure if it ist the only setting on quality/preview though.

Cheers
Sascha

There is also this: (High quality processing from size)

Hi,

thanks, but that does not change the issue.

Hi,

thanks, but I am afraid that refers only to the thumbnails, not the full previews.

I’ll have to test more but I think running on windows the W preview is clearer in darkroom view vs lighttable …so doesn’t sound as bad as yours but to me visibly not as sharp. I removed all processing …only wb…then hit w in darkroom and w in lighttable and to me the image is not the same…

I wIll test more…still does not sound exactly like what you are seeing…its not pixelated or showing any artifacts…

MIght it be that you are using the embedded jpegs in lighttable? Some camera’s/brands produce embedded jpegs of at most 1920×1080 pixels. If you have a high-resolution screen, that’s perhaps not enough.

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I don’t think so, as the previews do show the result of dt’s edits, only with a lesser resolution.

Hi Sascha,

I have to retract my previous statement. Unchecking the “prefer performance over quality” box, does work now. I think I had forgotten that to rebuild the previews you had to not only enter darktable mode from lighttable, but also make some actual changes to the edits.

thanks for the tip!

giuseppe

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Hi Giuseppe,

no worries, you are very welcome :slight_smile:
Glad it worked and thanks for writing back.

Sascha

You can delete the thumbnail cache instead. On Linux: ~/.cache/darktable/mipmap*

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Thanks, that may be quicker!