blending modes

Denis Dunbar - How to remove artifacts in your Jpegs

Hunting Down JPEG Artifacts with Difference Blending!

Dennis Dunbar

By using this simple test you can see for yourself just what detail might be getting lost when you scale & save your high res images using a lossy format, such as JPEG.

Photoshop-layer-blending-modes

Creative Compositing with Photoshop’s Layer Blending Modes

David Salahi

In the video below, Mark S. Johnson demonstrates the process of layering a model's photo onto a wintry scene with a tree and some birds.