LayersThat

LayersThat is a software framework designed to provide flexible layering capabilities for vector graphics and user interface components. It was introduced in 2015 by an independent developer community and has since been incorporated into several open‑source design tools. The framework allows developers to compose visual elements in separate layers, each with independent styles, transformation matrices, and opacity settings. This modular approach simplifies complex rendering tasks, enabling more efficient manipulation of individual elements without affecting the entire composition.

The core of LayersThat is a lightweight API that exposes commands for adding, removing, and reordering layers, as well as for merging or flattening them into a single image. It supports standard vector formats such as SVG and PDF, and can be integrated with popular graphics editors like Inkscape, GIMP, and Figma via plugin adapters. The layering model is compatible with both raster and vector content, making it suitable for web designers, game developers, and digital artists who need precise control over visual hierarchies.

One notable feature of LayersThat is its real‑time preview system, which renders changes instantly in a canvas element. This eliminates the need for lengthy export stages and allows designers to iterate quickly. Additionally, the framework provides a JSON schema for layer definitions, facilitating version control and collaboration in team settings. Its open‑source licensing under the MIT License encourages community contributions and extensions for specialized use cases such as data visualization or augmented‑reality overlays.

LayersThat has gained adoption in educational settings where students learn about graphic principles by manipulating layers interactively. It has also been cited in academic papers on vector graphics optimization. While the project maintains modest community activity, its straightforward design and integration capabilities keep it relevant for developers looking to add robust layer management to their visual applications.