Automated process to apply to image?

Processing
4

I used G’MIC (CLI) to create that image

gmic -sp tiger .x2 -mirror[0] y -mirror[2] y -a y .x2 -mirror[0] x -mirror[2] x -a x -o sample.png

but it could easily be adapted for the G’MIC GIMP plugin.

Let me break it down in case you aren’t used to reading such a command.

  1. Source image.
  2. Duplicate image so that we have 3 tigers in total.
  3. Flip the first and third tiger.
  4. Tile-merge them vertically into one layer.
  5. Duplicate the layer so that we have 3 sets of tigers.
  6. Flip the first and third sets.
  7. Tile-merge horizontally.

This saves some alignment time.