Lightroom

Lightroom — Rendering Previews

Lightroom — Rendering Previews

Previews are controversial, somebody will tell you that you should render them 1:1 on import of the photos. Somebody else will tell you that you shouldn't generate the 1:1 previews.

  1. There is NO correct answer.
  2. It's a preference.

The 1:1 preview of the photo is used in:

  • The library module when you go to a high resolution enough, usually around 1:3 but that will depend on the catalog setting: standard preview size.
  • The develop module: always.
  • The slideshow module when you go to a large enough slide.
  • The print module: always.
  • The web module: almost always, depending on the size of the photo behind the gallery.

Selecting to generate the 1:1 previews of the photos is a balance between:

  1. Available disk space
  2. Perception of speed

And the keyword here is perception. It always takes exactly the same amount of time to generate the 1:1 preview of a photo. The question is:

  1. Do you want to spend the time at import?
  2. Do you want to spend the time when you are working on the photo?
  3. Do you want to spend the time when your computer is idle?

In the Library module, from the Library menu:

Lightroom: Generate Previews
Lightroom: Generate Previews
Ligntroom: Generate Previews for only 1 selected photo or all photos
Ligntroom: Generate Previews for only 1 selected photo or all photos

So what's the correct answer: your preferences. You will have to balance:

  • Your perception that Lightroom is slow
  • The available disk space
  • Your patience
  • Having these thousands and thousands of files, for your previews, on your disk.

My personal preferences:

  • For a few hundred photos: generate all the previews 1:1 at the import and keep them.
  • For a few thousand photos: generate all the previews 1:1 as an overnight job and keep them.
  • Storage is cheap, $100 Canadian per terabyte and becoming cheaper every couple of month.
  • If you need space, all previews can be deleted from the same menu. Lightroom will regenerate them as needed.

Tags: Dam | Lightroom | Lightroom-How-To | Technical