-Renderable and a tag to render it with and may also have Lighting, Clipping,
-DepthTest and Blend states. Scenes can be used to further organize Renderables
-within a step.
+Renderable and a tag to render it with. Lighting, DepthTest and StencilTest
+states may also be applied to steps. Scenes can be used to organize multiple
+Renderables within a step.
+
+The target framebuffer can optionally be cleared before the first step.