If a command-line solution would do the trick, you can use the
tmxrasterizer that ships with Tiled and write a small shell script that looks like this:
tmxrasterizer --show-layer "Layer 1" <map-file> <image-file-1>
tmxrasterizer --show-layer "Layer 2" <map-file> <image-file-2>
tmxrasterizer --show-layer "Layer 3" <map-file> <image-file-3>
There is currently no automated way to do all layers with one command, though it could be easily added if there’s demand for such a feature. The above is more flexible though, since it enables you to export groups of layers to a reduced set of images, for example (you can repeat
--show-layer arguments to show multiple layers).
Thanks both, very helpful information. I’ll see how I go with the knowledge update.