I just found this on the Frogburps website. What a joy it is to watch an artist at work.
Read on:

We recently posted our first short story, Sticky Picnic, and below you can watch the creation of the illustration that went with that story – from sketch to finished illustration. It took just shy of 8 hours to make, but like the popular meme goes; “Ain’t nobody got time for that”, so you get the condensed version below, although at 5:27 it is a bit longer than our other videos
We have several of these shorts in the works. They’re a nice way to give you something fun when we’re in between .

It's amazing to see this illustration come to life.

Be sure to watch the video below: