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Developer builds smooth 60 FPS animated 404 page using browser-side video processing

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A developer created a custom 404 error page featuring four animated 3D characters — a shark, cactus, raccoon, and duck — rendered directly in the browser using video rather than real-time 3D engines. The core challenge was removing video backgrounds at runtime while maintaining 60 frames per second across devices, including mobile. Performance was improved by separating processing resolution from display resolution, running the expensive background-removal step on lower-resolution frames before scaling the output back up. This approach significantly reduced CPU and GPU load without noticeably degrading visual quality. The project highlights a broader optimization principle: making costly intermediate processing steps cheaper can be more effective than simply reducing the size of the final output.

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Developer builds smooth 60 FPS animated 404 page using browser-side video processing · ShortSingh