An OpenXR composition layer that is rendered as an internal slice of a sphere. An OpenXR composition layer that allows rendering a [SubViewport] on an internal slice of a sphere. The central horizontal angle of the sphere. Used to set the width. The number of segments to use in the fallback mesh. The lower vertical angle of the sphere. Used (together with [member upper_vertical_angle]) to set the height. The radius of the sphere. The upper vertical angle of the sphere. Used (together with [member lower_vertical_angle]) to set the height.