This class allows for a RenderSceneBuffer implementation to be made in GDExtension. This class allows for a RenderSceneBuffer implementation to be made in GDExtension. Implement this in GDExtension to handle the (re)sizing of a viewport. Implement this in GDExtension to record a new FSR sharpness value. Implement this in GDExtension to change the texture mipmap bias. Implement this in GDExtension to react to the debanding flag changing.