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

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