The most critical classes are the {@link com.jme3.renderer.Renderer}, which is the low-level rendering implementation and is abstract, and the {@link com.jme3.renderer.RenderManager} class, which provides the high-level rendering logic on top of the Renderer.

To accompany rendering, several helper classes are available.

• The {@link com.jme3.renderer.Camera} is used to specify the point-of-view from which scenes are rendered.
• The {@link com.jme3.renderer.ViewPort} is the aggregation of a Camera and a set of {@link com.jme3.scene.Spatial scenes} which are to be rendered, as well as additional info.
• The {@link com.jme3.renderer.Caps} class contains renderer capabilities which the user can query to find out what features are available in the rendering implementation.
• The {@link com.jme3.renderer.Statistics} class is updated in real time by the Renderer, and is used to find out various statistics about the rendering
• The {@link com.jme3.renderer.GLObjectManager} and {@link com.jme3.renderer.GLObject} classes provide a link between the renderer's native objects and Java's garbage collected objects, allowing the engine to track when the Java object counterpart is garbage collected and then delete the native object counterpart from the renderer.