GLAM combines the power of WebGL with a set of easy-to-use markup tags and style properties. With GLAM, 3D authoring is like any other web authoring. To make 3D, you create elements, set their attributes, add event listeners, and define styles. Just like DOM used to make! Content is easy to animate: keyframes and tweens can be defined in a compact set of markup tags, or as standard CSS3 animations or transitions.

GLAM is also fully extensible: to add custom behavior, write JavaScript event handlers. If you want fancy shading written in GLSL, simply specify your vertex and fragment shaders as properties of the object's style. GLAM renders with WebGL, using Three.js, and adds behaviors, interaction and lots of easy-to-use features on top. But most importantly, GLAM defines a markup language and set of stylesheet extensions that make 3D programming a snap.