The camera we're going to be using to render

If enabled, the scene will only render once. That isn't totally accurate though, because we'll also re-render the scene when the size of the panel changes.

The Scene this panel renders.

The texture that the panel is rendering to internally. This will change to a different texture if the panel changes size, so I wouldn't hold onto this object.

Shortcut to Camera.World

Render the panel again next frame. This is meant to be used with RenderOnce, where you might want to render on demand or only once.