3D carton box picture

I regularly (several times a month) have to make a 3D picture out of the art-work design PDF for a diecut for a carton box. This picture is mainly to use online, but sometimes as well for offset printing in highres.
My favourite way of working would be providing the PDF by i.e. Skype and then name the 3 sides that need to be visible in the 3D.