Composite images with wildcard and transparency

[Bingo]

Hi all !

I am trying to overlay 3 PNGs in one command.
They all have a white background that must be used as transparent color.
They are also named with the same pattern : image_XXXXX_tmp.png

I tried with this command, but one of the images does not appear in the final image :

convert image_*_tmp.png -transparent white -composite merge.png

merge.png looks good, but only the first 2 of the 3 images (in alphabetical order) are visible.
Is my command syntax wrong ?

Thanks a lot for your help !

[fmw42]

-composite only allows two images and a mask. try -flatten or -layers merge

http://www.imagemagick.org/script/comma ... php#layers
http://www.imagemagick.org/Usage/layers/

[Bingo]

-layers merge works great, thanks a lot !