Let's have some book. Due to the typesetting, there is some blank space, maybe even some blank pages.
I'd like to fill it with some images related to the place, i.e., the image is selected specifically for the previous chapter/song/whatever. The purpose of such images is just to fill some blank space with something related, but they aren't essential for the content.
Of course, one can insert images manually using includegraphics, but when something changes (paragraph inserted, margin changed, font changed, …), some blank space can disappear. In that case, I do not want the image to be there – it should be just skipped.
I believe there must be some way to do this, but I haven't found it.