
Here's a comparison between my thumbnails and the final art from Chapter 2 of The Front: Rebirth.
You can see that while the moment choices are pretty much what I went with, the illustrations in the thumbnails are only meant to capture a sense of space and movement. I rarely worry about getting much detail or perfect anatomy on my characters.
The dialogue is equally rough. Panels 1 and 6 both went through revision. It's clear that I didn't have Jared's voice nailed at the time of the thumbnails, and I decided that Rex should probably refer to his adopted son as "son". That small revision changed him from aloof protector to stressed-out father.
But the idea is to blast through the thumbs quickly, focusing only on a few aspects of storytelling. Final dialogue, perspective, anatomy, and fine details can wait until the last round.
Jerzy