Since version 1.0.6. it is possible to modify the size of the image independly from the size of the gallery itself. The advantage is that it is possible to crop the images which allows to get images with the same size no matter if the original image is in landscape or portrait format. An explanation can be found in the TsRef.
Configuration of this page
SmoothGallery I
Width of image: 330c+30
Height of image: 330c-25
Width of gallery: 330
Height of gallery: 330
SmoothGallery II
Width of image: 420c
Height of image: 160c
Width of gallery: 420
Height of gallery: 160
SmoothGallery III
Width of image: 420c
Height of image: 160c
Width of gallery: 420
Height of gallery: 190