Soft (low resolution) preview in loupe

[YannigVdW]

Hi,

My previews are initially soft (low resolution, slightly compressed) when I preview them in loupe at "fit". Until I zoom in to 100% (goes pretty quickly, ~1s), and return to "fit". From then on the preview is high resolution as it should be.

Just waiting does not generate the high resolution preview. 

All previews are rendered before checking at 1:1.

I tried different preview catalog settings, different resolutions, different qualities. This does not seem to have any influence on the previews. The previews were always discarded before changing settings and rendering them again.

In attachment: a preview before zooming, and one after zooming.

I hope someone knows what's going on, as I'm wasting my time zooming in and out again on nearly every image.

My system: Windows 11 23H2, i7 14700KF, 64GB, RTX 4060 Ti 16GB, catalog and pictures are on m.2 SSD. Windows and all drivers are up to date.

[F. McLion]

What did you select upon import for the previews, in the Import dialog on the right side?

From the Library menu, you can always choose to generate standard or 1:1 previews for the selected photos.

[YannigVdW]

Thanks for your quick reply.

I don't import my pictures, I synchronize a parent folder.

But, as I stated in my post: "All previews are rendered before checking at 1:1.". I.e. after synchronizing I render all previews at 1:1.

[johnrellis]

1. When the problem occurs, what is the setting of Catalog Settings > Previews > Standard Preview Size?

2. What is the resolution of the display?

[YannigVdW]

I tried multiple settings before (see original post). Right now it is configured at 2048px/High.

The resolution of my main display is 1920x1200px and Scale (Windows setting) is set to 125%.

[johnrellis]

You could try discarding the current preview cache entirely, following the precise instructions here:

https://helpx.adobe.com/lightroom-classic/kb/lightroom-gives-error-preview-cache.html

This will rebuild the entire database of previews from scratch, which can take some time. 

[YannigVdW]

Thanks for the tip.

I followed the instructions as described in your link.

However, the problem persists.

I find it strange that even after deleting the previews and clearing the cache, (raw) b&w pictures still immediately appear in b&w, as if some preview still resides somewhere. Or is this supposed to work like this nowadays? I remember that LrC didn't show this behaviour long time ago.