We know it when we hear it, but what do our eyes do when we see it? Cacophony! Vocabulary.com says this: "A cacophony is a jarring, discordant mix of sounds that have no business being played together. When the orchestra tunes up before a show, it sounds like a cacophony because each musician is playing a completely different tune, at different times, and at different volumes."
Although each of our senses has a unique function, they communicate in concert so it is not out of line to apply one sense's definition to another. Here's an example of visual cacophony that might fit very well with vocabulary.com's definition.From an artist's viewpoint, if our resource is in clutter, it has visual cacophony. That doesn't mean it is unusable, but it does require some clearing out of junk before selecting and placing images we want to work with. In other words, rather than use everything we see, we'd do better to decide what needs to be left out.
This image is visual cacophony. The llamas might be the subject or the tree or the house, but the scene with all these images from this point of view is cluttered.