When to make LODs (2021)

When to make LODs (2021)(medium.com)

27 points by azeemba 305 days ago | 6 comments

iFire 305 days ago |

In godot engine we decide to do a continuous level of detail based a pixel error metric. (simplified explanation pixel-error -> based on fov -> based on floating point error of the meshopt_simplifyWithAttributes function)

The 12 ish lods are automatically generated by https://github.com/zeux/meshoptimizer.

https://docs.godotengine.org/en/stable/tutorials/3d/mesh_lod...

We allow a hierarchical level of detail if people want to set it up.

iFire 305 days ago | |

Our budget couldn't afford Epic Games style nanite, but there are three js implementions.. so it's not impossible to recreate.

- https://github.com/AIFanatic/three-nanite

- https://news.ycombinator.com/item?id=42974461

three-nanite is based on https://github.com/zeux/meshoptimizer cutting each mesh into maybe 124 triangles per chunk.

esperent 303 days ago | | |

That's a cool demo (even if it doesn't work on my phone, I get it from the video), but it's a long, long way from a nanite implementation. At best I'd call it dynamic LODs or something.

e-topy 303 days ago |

Jason Booth (the author) also has a YouTube channel talking about similar topics. I really liked his 'Practical Optimizations' video: https://youtu.be/NAVbI1HIzCE

jodrellblank 291 days ago | |

Thanks for the cool video link!

mrala 302 days ago |

LOD = level of detail