Dome features like Corona

[darioOrtisi]

Hi. I will like to point your attention on this feature inside Corona Render. The video is from Jeff PAtton. I like so much the simpliest method. To reproduce this method inside maya i have to create manually the dome, move the projection in height to match the position of the camera(original shot). After that i need to separate the plane shape of the dome and on the plane set cast shadow "ON" but on the Sphere i set only the primary visibility because the aberration, the shadow, the self shadow and the overbrightnes reflection on rendered image i have. https://www.youtube.com/watch?v=9eYsM2FRUE0

Thanks