By default Lemmy seems to be mirroring every link’s preview image. Even when that link was originally posted on an external Lemmy instance. That can put quite a strain on small servers. Is there a way to disable this? Ideally I would have pict-rs just be used to host the images my users upload and nothing else.

Solved:

Add

  pictrs: {
    image_mode: "None"
  }

to lemmy.hjson.