Suggestion: Preloading of lightbox imagesBrowser Info Environment
Grid Gallery 2 is a great and feature rich gallery add-on. The only suggestion i would like to add is consider implementing a preloading functionality for lightbox images, in order to avoid that rather annoying delay between viewing images in the lightbox, caused by the fact that each image is loaded into the browser cache only when it is called for viewing, and not in advance.
A preloading function for the next/previous image would result in a much smoother viewing experience. Both next and previous images would be needed, because any thumbnail can be the starting point for viewing in the lightbox.
Fancybox for example has a setting for preloading images which can be set as a custom number in a custom template.