After seeing Spiderman: Into the Spider-Verse, I was in awe of how the team managed to achieve such an iconic look and style for a comic book movie. I knew that there were some neat animation tricks going on to help it feel the way that it did, but damn did I want to know the details. Luckily fxguide published their article about all the secret animation and visual techniques straight from the minds of the producers at Sony Pictures Imageworks.
I particularly liked the detail about Graphical Flash Frames, which essentially set out to recreate the frames you might see in a comic book, except animated.
In addition to the above extremely-helpful-article, the incredibly talented Alberto Mielgo uploaded his early storyboards for the project, which indicate the look and feel of the direction the film would go. Really facinating to see how some quick sketches came together into something so magnificent.