Shannon Potter (@cifilter) / X

Shannon Potter

3,056 posts

Shannon Potter

@cifilter

🎨 iOS/macOS design engineer 👨🏻‍💻 Open to contracts. Current: @perplexity_ai, (redacted) x2. Former: @browsercompany @lyft @airbnb @path.

Nashville

Joined August 2022

Pinned
Shannon Potter
@cifilter
Jul 2
Is this the final video I show of this crap? Who knows! 😂 Page-based, so aside from the Metal render window lagging behind the scroll view at insane velocities, we're looking really good now
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1.9K
Shannon Potter
@cifilter
Mar 5, 2025
I worked at Path back in 2012. Today, I found the codebase I had on a hard drive and managed to get it building after all these years. Very broken and unusable with no servers, but I'm about to cry. Working at @path was probably the best time of my life. 🥹
108K
Shannon Potter
@cifilter
Sep 6, 2024
I think we got this idea from another app, but using PIP to continue playing an instructional video on how to add widgets to your Home Screen is a pretty great idea!
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Shannon Potter
@cifilter
Sep 5, 2024
SwiftUI's rendering pipeline seems to be pretty well optimized, even when embedding AVPlayerLayer as a view representable, applying color inversion + hue rotation effects (for Dark Mode), and complex masking + shadow effects.
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18K
Shannon Potter
@cifilter
Mar 11, 2025
So @telegram legit has some of the cleanest iOS animations I’ve ever seen. The UI is extremely “stock” and utilitarian (maybe to a fault), but their animation work is seriously impressive. Any idea who worked on them?
11K
Shannon Potter
@cifilter
Oct 22, 2024
For many, many years I tried to find a way to apply filters/shaders to a UIKit hierarchy in real time. Apple frustratingly only supports this privately (but it works well!) via CAFilter. So instead, I used SceneKit's renderer since SCNNode supports (animatable) CIFilters! 🤓
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Shannon Potter
@cifilter
Apr 4, 2025
Metal shaders are so awesome
Minsang Choi
@radiofun8
Apr 2, 2025
Dear diary, #SwiftUI + Metal
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4.9K
Shannon Potter
@cifilter
Mar 5, 2025
Replying to @cifilter and @davemorin
Here’s a screenshot of the actual iPad app running.
4.1K
Shannon Potter
@cifilter
Dec 9, 2024
So. I managed to capture every CAFilter available (on macOS at least, but likely on iOS as well), as well—importantly—the inputs 😏
5.7K
Shannon Potter
@cifilter
Mar 5, 2025
Replying to @cifilter
@davemorin thanks for bringing together such a special team to work on a product that was well ahead of its time!
5.7K
Shannon Potter
@cifilter
Dec 11, 2024
You wouldn't believe how incredibly complex and detailed @elfanek's sick highlight effect (top) was to implement (bottom)! Shown with and without blurs active. Several different blurs and blend modes (courtesy of CAFilter 😇). Just wait till I start animating things!
5.1K
Shannon Potter
@cifilter
Sep 26, 2024
Honestly, the folks @browsercompany have been the best people to work with, hands down. 💙
3.3K
Shannon Potter
@cifilter
May 22, 2025
After 15 years of iOS/macOS development, there's one universal truth I can espouse: non-trivial animation code is _not_ pretty
2K
Shannon Potter
@cifilter
Sep 6, 2024
Combining some subtle 3D and 2D transforms—all with varying animation durations—to make things feel "floaty". I kind of like it. If I was feeling extra ambitious, I'd transform the shadow underneath it, too. 😛
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