When I was working on an image in Lightroom I recognized that the image is compressed (see image below) but I always record my images lossless compressed. Also the image seems to be fine when exported so it is just the preview in Lightroom. Is this something that can be deactivated?

enter image description here

  • \$\begingroup\$ Do you mean by lossless images RAW files? And what is the camera in question? \$\endgroup\$ Nov 6, 2020 at 11:22
  • \$\begingroup\$ Yes, lossless compressed RAW files. Im shooting a Nikon D800. \$\endgroup\$
    – Arji
    Nov 6, 2020 at 11:29
  • \$\begingroup\$ Related: switched to RAW and seeing ugly light bands in Lightroom Different (though related) artifact when previewing raw image conversions, but the answer is the same. \$\endgroup\$
    – Michael C
    Nov 6, 2020 at 13:55

1 Answer 1


While you not provide details about the images you work with, I can only answer in a very general way.

I assume that you are working with raw images. As raw images are not an image per se, it has to be interpreted by Lightroom. This images is either generated on the fly or pre-generated as a preview.

You can set the quality of the preview in Lightroom. You find the default setting in the Catalogue Settings / File Handling / Standard Preview Size.

You can also generate higher quality previews in the Library Module: Library / Previews / Build 1:1 Previews or Build Smart Previews

The final full resolution image will only be generated when you export an image.

  • \$\begingroup\$ "The final full resolution image will only be generated when you export an image" What about if you buil 1:1 previews, isn't that equal to the final full resolution image? \$\endgroup\$ Nov 6, 2020 at 12:28
  • \$\begingroup\$ It is very near to it. I assume that the applied filters might get rendered in a better quality. \$\endgroup\$ Nov 6, 2020 at 12:37

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