Could it be possible to have an option to preload them? I know it doesn’t take long as it is but if I’m scrolling down a list of themes it slows it down a bit. I don’t really mind taking a small hit on bandwidth to preload them, so when I mouseover they’re instant.
If you’re talking about here at ThemeForest, that would be a lot of images to preload. It’s best to let them load on request.