I built a custom open-world engine for the N64. In this video, I break down how I achieved a seamless, massive world with zero loading screens on N64 hardware. 

You can download it here
https://github.com/lambertjamesd/n64brew2025/releases

Here is the team that helped me work on this. 

Pyroxene: https://x.com/pyrox3ne
Caitlin G Cooke: https://cgcooke.itch.io/
terzdesign
Kælin: https://betadynast.bandcamp.com/


I will be using these same techniques in my ongoing project. If you want to support this work and follow the development journey, you can find me on 

Patreon: patreon.com/JamesLambert

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A developer explains how they achieved Skyrim-scale draw distances on Nintendo 64 hardware by rendering the world in two passes: a low-detail distant pass (scaled down ~100x, Z-buffer disabled, back-to-front ordering) and a high-detail near pass. The core problem is the N64's 15-bit Z-buffer, which causes Z-fighting at large distances due to non-linear depth value distribution. The solution uses multiple LOD tiers with baked textures per terrain chunk, and replaces the N64's hardware fog blender with the color combiner unit to achieve realistic atmospheric perspective using RGB interpolation and vertex color gradients. Gameplay design choices like fast traversal and a fog-of-war map system compensate for the sparse open world.

How I Built an Open-World Engine for the N64