How can I make a montage which seamlessly tiles the same one image file? I would like to preview how **one single image** (768x1024 px .tiff) would look as a pattern by generating an output file where it is _tiled_ in such and such a way (4x4, 5x5, etc.). The image should be scaled down somehow but not cropped and there should be no border so the transition is _seamless_. How can I generate such a _montage_ on the command line?

Of course you can use `montage` from the _Imagemagick_ suite of utilities. The image has a 3:4 aspect ratio; preserve that in the geometry setting to avoid cropping related issues and borders. It's just about repeating that file name as input in the command, and basic arithmetic. Maybe there was something in the manual, but otherwise, assuming the 4x4 "tiles" example, you can try:


montage $(printf 'yourfile.tiff%.0s ' {1..16}) -geometry 192x256 -tile 4x4 -unsharp 0x.5 output.tiff


The command substitution is unquoted to generate the required tokens. With a final touch of _sharpen_.