Custom scene renderers
To create a custom renderer, directly implement the ISceneRenderer or use a delegate through the DelegateSceneRenderer.
Implement an ISceneRenderer
The SceneRendererBase provides a default implementation of ISceneRenderer. It automatically binds the output defines on the renderer to the GraphicsDevice before calling the DrawCore method.
[DataContract("MyCustomRenderer")]
[Display("My Custom Renderer")]
public sealed class MyCustomRenderer : SceneRendererBase
{
    // Implements the DrawCore method
    protected override void DrawCore(RenderContext context, RenderDrawContext drawContext)
    {
        // Access to the graphics device
        var graphicsDevice = drawContext.GraphicsDevice;
        var commandList = drawContext.CommandList;
        // Clears the current render target
        commandList.Clear(commandList.RenderTargets[0], Color.CornflowerBlue);
        // [...] 
    }
}
Use a delegate
To develop a renderer and attach it to a method directly, use DelegateSceneRenderer:
var sceneRenderer = new DelegateSceneRenderer(
    (drawContext) =>
    {
        // Access to the graphics device
        var graphicsDevice = drawContext.GraphicsDevice;
        var commandList = drawContext.CommandList;
        // Clears the current render target
        commandList.Clear(commandList.RenderTargets[0], Color.CornflowerBlue);
        // [...] 
   });