Show HN: Fio: 3D World editor/game engine – inspired by Radiant and Hammer

vicioussquid 52 points 4 comments March 26, 2026
github.com · View on Hacker News

A liminal brush-based CSG editor and game engine with unified (forward) renderer inspired by Radiant and Worldcraft/Hammer Compact and lightweight (target: Snapdragon 8CX, OpenGL 3.3) Real-time lighting with stencil shadows without the need for pre-baked compilation

Discussion Highlights (3 comments)

tines

Looks awesome. Anything been made with this?

voidfunc

Ugh this makes me nostalgic for the days of Q3-era game map making and custom servers. I used to get lost in the various games Radiant variants as a teen building DM and CTF maps for my clans server.

LarsDu88

Does this use BSPs for draw optimization?

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