Animating rotation of environment-map

Hi All. I’m looking for a way to automate the rotation of the Rhino Environment Map and create a PNG for each increment of 2-20 degrees. Similar to a standard “Sun Study” but without the Sun :slight_smile: I’m going to use the still-images to present clients with simple options to choose from in a 100% automated way.
I have attached a couple of pictures created by manually rotating, rendering and saving three images.