Layerlists

Layerlists are a fundamental concept in computer graphics and image editing software. They represent a collection of superimposed transparent layers, each containing different visual elements. When viewed together, these layers create a composite image. The order of the layers is crucial, as it determines which elements appear in front of or behind others. This hierarchical structure allows for non-destructive editing, meaning changes to one layer do not permanently affect the content of other layers. This flexibility is highly valued in digital art, photography, and design workflows.

Each layer in a layerlist can contain various types of content, such as pixel-based images, vector shapes, text, or adjustment layers. Adjustment layers, for instance, modify the appearance of the layers below them without altering the original pixel data. Transparency is a key feature, enabling elements on one layer to show through to layers beneath. Blending modes offer another powerful tool within layerlists, dictating how the colors and luminosity of a layer interact with the layers below. Common blending modes include multiply, screen, overlay, and soft light, each producing distinct visual effects. This ability to control interactions between layers is central to achieving complex and nuanced visual results.