This might seem like a bit of a newbie question, but it's always had me a little confused:
Why do I often see so many 3D render breakdowns (stills and animation) add a reflection (and/or refraction etc) pass on top of the beauty pass?
Ie; why is the artist adding more reflections on top of the
presumably already physically accurate render? Is this purely an artistic decision? Is there some trick I'm unaware of? Is this a common must-do in 3D art? Or is the artist just trying to improve the way the reflections look, as they didn't quite nail them in the original render?
I see so many break-downs that add this, and in all honestly it doesn't seem to add much to the image as a whole... an example from today:
https://www.linkedin.com/posts/vincent-filhine-tr%C3%A9sarrieu-13654a78_3dsmax-coronarenderer-nuke-ugcPost-6775112713996668928-_nZ2Much obliged for any enlightenment!