Hi, we don’t use the 6 faces style cubemaps any longer. Now they have to be long-lat like HDR maps. The camera vector input automatically works with these formats without you needing to do anything.
I also found a free photoshop plugin that converts between cube based cubemaps and longlat maps. It is called flexify2, check it out. I have used it many times to make an image from 6 static screenshots of a level.