Render Elements or Render PassesRender passes allow a rendered frame to be further broken down beyond the capabilities of Render Layers. Render Passes vary among render engines but typically they allow an image to be separated into its fundamental visual components such as diffuse, ambient, specular, etc.. allow for the rendering of specific elements of render to be separated into different images which can then be recombined in a compositing program such as Nuke or After Effects for tuning after the render is complete. For example a render pass can contain just the reflections on a surface, or just the diffuse lighting or just the masks based on shared materials and so on. The Render Passes have been organized into six categories: