Invisible – Sets the visibility of the HDRI in the viewport.
Set for Light Bake – Enable for V-Ray Bake. This sets the skylight and directional light mobility to static. When unchecked the skylight is set to Stationary.
Auto Update – When enabled, reflections are automatically updated.
NEW – Dome Tex Resolution – Specifies the resolution at which the texture is resampled (No effect in viewport).