In art, a thumbnail or thumbnail sketch is just a fancy way of describing a tiny, rough drawing you make quickly to get some basic information about an image you want to make. They are small (like your thumbnail, lol) and the idea is that you get down some ideas quickly to try out different compositions and concepts without having to commit to anything bigger or more time consuming.
Illustration: The Magic of Thumbnailing
Illustration: The Magic of Thumbnailing
Illustration: The Magic of Thumbnailing
In art, a thumbnail or thumbnail sketch is just a fancy way of describing a tiny, rough drawing you make quickly to get some basic information about an image you want to make. They are small (like your thumbnail, lol) and the idea is that you get down some ideas quickly to try out different compositions and concepts without having to commit to anything bigger or more time consuming.