Fresnel
Studio lighting for your webcam. Drag virtual lights around your face and watch the scene relight in real time.
- Platform
- macOS, Apple Silicon
- Stack
- SwiftUI, CoreML, Metal
- Get it
- Mac App Store
About
Fresnel is a small macOS app I built that relights your webcam feed with virtual lights. It estimates how far every pixel is from the camera, so a light you drag around behaves like a real lamp: your face, shoulders and the wall behind you all respond to it. Everything runs on-device, in real time.
Tech
- CPUCamera frameAVFoundation
- Neural EngineDepth estimationDepth Anything V2, small fp16 via CoreML
- Metal (GPU)RelightingCustom shader to relight
- macOSVirtual CameraKernel Extension to use it anywhere
The idea is based on a WebGPU demo by Konrad Reczko. I rebuilt it as a native app so the depth model can run on the Neural Engine and the shading on the GPU, which keeps it fast enough to leave running during a call.
- Swift
- SwiftUI
- CoreML
- Metal
- Depth Anything V2
