This stage will render the game to a render texture in its original dimensions as provided in the constructor,
then depending on selected ContainerUpscaleMode will scale the contents proportionally. The stage will then
be centered in the available spcae that is left.
This stage will render the game to a render texture in its original dimensions as provided in the constructor, then depending on selected ContainerUpscaleMode will scale the contents proportionally. The stage will then be centered in the available spcae that is left.