a View can be inserted at any point in the scene, and will be rendered into either the framebuffer or any child RenderTarget's there may be.
the projection matrix to use for the render.
the viewport to use for the render (x,y,width,height).
link to a scenegraph node to render.
scale to apply to camera distance when evaluating level-of-detail nodes. For example, if it's 0.0f the highest resolution lod will always be selected.