I put a real-time 3D shader on the Game Boy Color
blog.otterstack.com
February 8, 2026
13 min read
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63/100
Summary
A real-time 3D shader has been implemented on the Game Boy Color, allowing players to control an orbiting light and spin an object in a game. The project includes downloadable ROMs and source code available on GitHub.
Key Takeaways
- A real-time 3D shader was successfully implemented on the Game Boy Color, allowing players to control an orbiting light around a spinning object.
- Normal maps were utilized to encode the normal vector at each pixel, which is a common technique in 3D graphics.
- The Game Boy's lack of multiplication and floating-point support required the use of logarithms and lookup tables for mathematical calculations in the shader.
- The project involved using Blender for creating normal maps and compositing techniques to achieve the desired visual effects.
Coverage & discussions
Hacker News · blog.otterstack.com
Community discussions
Community Sentiment
Positives
- The shader's impressive visual results demonstrate innovative use of normal mapping techniques, enhancing the Game Boy Color's graphics beyond its original capabilities.
- The project showcases a creative blend of retro gaming and modern techniques, appealing to both nostalgic gamers and tech enthusiasts.
Concerns
- The attempt to incorporate AI into the project was ultimately deemed a failure, highlighting challenges in integrating AI into hobbyist endeavors.
- There are ethical concerns regarding the use of generative AI, as failing to disclose its involvement could undermine trust in the creative process.
