Category Archives: graphics

Big Wet Pixels Live at THU 2024

THU was an unforgettable experience. If you ever get the chance to go, I highly recommend it! I don’t have time right now to do a writeup of the full event, but I can tell you about one slice of it: my demo of Big Wet Pixels was a lot of fun!

One big concern I had in the weeks leading up to the event was the logistics. How could I show my system painting a live subject (ideally a volunteer) on stage in front of an audience? For the experience to work well, the setup would have to fit a lot of constraints: I’d have to be able to reach my laptop keyboard and see the screen. My camera would have to see the subject. The subject would have to see what’s happening on the screen, and also see me. And the audience would have to see the screen, the subject, and me. I wasn’t sure there was a solution to this problem in euclidean 3-space that didn’t violate any laws of physics.

Then I got to visit the venue.  And it looked like this:

The stage setup in the BYD Room at the Tróia Conference Center.

A stage in the center, five rows of seats all around, and great big LED screens on all four sides of the room! It was perfect. Better than perfect. It’s immersive, intimate, and equitable: there are literally no bad seats in the house. And from the stage, you feel close to every single person in the audience. This was by far the most innovative setup I’ve ever seen for a conference venue.

It took a couple of tech check sessions to get everything working (note to self: 15 minutes is not enough time to test out such a complex setup!) and I had to make a few last-minute tweaks to my code to make sure it would fit the aspect ratio of the big screens, and add controls to adjust the framing of the subject on the fly (arrow keys are much quicker than trying to adjust a tripod head supporting a long heavy lens!) but when the time came for the actual demo, everything worked perfectly.

Miguel Pólvora, a member of the THU team, helps me test out the system during our tech check the night before my talk. Here you can see the full setup: laptop on the table, Canon 80D on the tripod, connected to the laptop via USB-C, and a chair on the other side of the stage. I especially liked how the colorful room lighting worked to provide a contrasting backdrop for the subject.
A particularly nice screenshot of Miguel from our tech check. Look at those gorgeous flow patterns!

I didn’t do much advance planning for how I’d operate the system, I just improvised in response to what was happening in the moment. So we only ended up exploring a sliver of the vast parameter space. But the participants that came up on stage seemed to have a lot of fun with it, posing for the camera, making faces, and using their hands and other props.

Olga Andryenko
Flavia Chiofalo

The audience asked really interesting questions, and I encouraged them to give me suggestions for what to do with the controls. (In a nod to Zach Lieberman, I told them, “the DJ does take requests!”) Before I knew it, we were out of time, and I had to pack up my gear and leave this beautiful room for the next speaker.

A panoramic view of the venue.
A few of the participants who sat for their portraits and/or asked interesting questions in the Q&A.
Continue reading Big Wet Pixels Live at THU 2024

COGGRAPH 2024

Image excerpted from Understanding Comics by Scott McCloud (1993)

Here’s something new! A group of researchers from MIT, Stanford, Cambridge and UW Madison have put together a new interdisciplinary workshop “at the interface between cognitive science 🧠 and computer graphics 🫖“, aptly named COGGRAPH. I’ll be on a panel about non-photorealistic rendering, next Tuesday, July 16th, at 11am Pacific (2pm ET). It’s virtual, free, and open to the public. If you’re interested, you can sign up here to see it!

Big Wet Pixels 10: Debug View

I’m midway through a (major, long overdue) overhaul of the fluid transport layer of my watercolor simulation. Made some good progress over the weekend. But more importantly: I made lots of new bugs. Glorious, unrepentant, face-eating bugs. I almost don’t have the heart to squash them.

https://vimeo.com/cassidy/big-wet-pixels-10

Big Wet Pixels 6

New today: exploring making each pixel smarter, with more thoughtful brushstroke planning. Starting to get excited about the shapes and textures that emerge. (In case it’s not obvious, I’m reaching for a Chuck Close vibe here. But his work has all kinds of depth to it, I’m barely scratching the surface as of yet.) Also, I’ve added some new types of randomized color palettes, including interference pigments on dark paper. So many happy accidents. I don’t think I’ll ever get bored of this.