OK I disabled the other plugin and I can see there is nothing special in order to use the gamma-gallery plugin.
The resolution on my pictures don’t look right. It seems that they are 200px X 300px in the shadow box. Only one of them seems to be a decent resolution. Any idea?
The resolution of one of the files that don’t appear right is 1560 x 2048. But it seems severely stretched in full screen mode.
Thanks,
Steven