Does anyone have some info on how to create simple spherical HDR maps for Carrara 3? The only thing the manual states the following: "They are easy to recognize; if you look at the image the contains the map [correctly quoted], it should completely fill the rectangle of the image.I" Carrara wants the image to have an .hdr extension. I have a copy of Stitcher 3.1, but it does not have an option to create a format w/ a .hdr extension.