Some questions regarding montage

[rinox]

I'm trying to put a chopped image together, like a puzzle.

let's say the image is chopped like this
1 2
3 4
then:

montage [1-4].png -tile 2x2 -geometry +0+0 end.png

will put them together like i want it to be.
how can i put them together if they're split like this

1
2 3
4
5 6

for example, or:

1 2
3
4

etc.

i tried using for the first example -tile 1x2x1x2 but that obviously didn't work.
help please.

The second question would be:
I have 5 folders and in every folder are a random number of image files.
i want montage to put all files in one folder into one image and name that image like this "folder%d_.png"

i'm looking for a command line that will do all 5 folders and create 5 images.
thanks in advance.

[fmw42]

If they are different sizes then you will need to append them one row at a time and then append the rows together. See -+append at http://www.imagemagick.org/Usage/layers/#append

Or flatten or mosaic all the images with specified offsets. see http://www.imagemagick.org/Usage/layers/#flatten and http://www.imagemagick.org/Usage/layers/#mosaic

If all the pieces are the same size, you can put in your montage null: to create spacers, I believe.

see montage at http://www.imagemagick.org/Usage/montage/

[rinox]

convert and composite did the trick
it was in your first link
thanks a lot