When using a Vue rendered image as Poser background you have to set Poser sunlight as it matches background shadows. I do it by trials and errors, a bit tedious There is a way to convert Vue sun coordinates, expressed in azimuth and pitch, in Poser infinite light coordinates, expressed in xRotation, yRotation, and zRotation?

not that I've seen. Aside from using completely and utterly differently lighting systems, I'm not certain there is a direct correlation in the systems since azimuth and pitch are expressions of x,y,and z from a single distant point, while the poser scheme is based on a world center. but then, I could also be entirely wrong.