Animating the correct parallax for a background

#1

A quick question guys
I’ve made a short low rez animation of the car - nothing special, just 60 frames, a small camera movement, all objects are static. I’ve used HDRI lighting and also have the sky reflecting on the objects (car paint etc), but I’ve not rendered the sky in the background (so this is black on the alpha channel for zero opacity). I’ve then added a flat plate overcast sky on a separate background layer in Nuke using a simple merge node.

My question is how do I get the background sky flat plate to move correctly with the rest of the animation? Do I need to import a virtual camera into Nuke to recreate the correct parallax? And do I need to matchmove it?

Thank you!!!

01 - Link To Animation With No Background

02 - Link To Animation With Cloud Background

#2

I’d just track the backplate to the scene in this particular case. It’s a sky plate which is far, far away so you won’t have that much parallax anyway as you would have with like buildings in close or mid range distance to your object.

If you already have a camera in a 3d software you may import it or use the camera tracker to create your own. However in order to get it completely accurate you’d need to push te sky plate a way back in 3d space and adjust the size properly. Bit of overkill to me.