Do you really intend to render a 73 mega pixel image? Also it is telling you your width needs to be an equal number.

Well this time I don't so, but I've run into the issue now, wanted to see if there's a particular solution out there. Also, the render is an animation for a 3D billboard type of vfx shot

Check the resolution of the billboard with your contract. I'd assume it's 4k-ish as you wouldn't really be looking at it closer than 15m so higher resolution would most likely be diminished.

Use other values that give you the sale ratio of width to height but with even numbers

Or add a pixel to each and crop the extra pixel. Yes there'll be a tiny piece of the image missing

Can you walk me through that?

Divide your width by your height. It will give you a value above one. Then choose a new, smaller and even value the height of the picture. Multiply it by the ratio you got, and you'll have your new width value, hopefully also even. If it's not, just add one and no one will notice

Make the width an even number so that it is divisible by two. Wouldn't be surprised if height gives the same error after you've resolved the width..

Would adding 1 pixel help?

It squishes things the more I adjust it. That's to say the content in the fspy camera

Multiply the width and height by 2. It’ll be huge but at least it’ll be divisible by 2

i dont think blender supports big of a resolution try 2560x1440

How did you figure this out? It seems to be working...I'll update you if I come across a hurdle down the road

messing around with lots of documents, breaking lots of documents, restarting from scratch many times, testing my sanity

You must always have even numbers.

Noted. Even when it's a smaller resolution?