🧊 Open & render a 3-D model - pure C#

The VLC promise for geometry: a cube is built as a real StlMesh, serialized to STL bytes (the 3-D-printing format) by the 1.6 StlWriter, then those bytes are re-opened by a single mesh front door and the parsed triangles are software-rasterized to the spinning render at right - no System.Drawing, no asset file. A 3-D model is just video rendered from your input.

media self-test: 34 KATs passed ✓

cube.stl → render

StlMesh → StlWriter → bytes → OpenAnyMesh → SoftwareRasterizer → Gif

triangles: 12
STL binary: 684 B
binary round-trip: bit-exact ✓
opened by: StlReader (sniffed structurally - STL-binary has no magic)

⚠ the mesh-loader scatter (findability)

nearly re-rolled an STL parser - it exists, twice. No unified opener (1.7 MeshSniffer → 310 F16).

format	status	decoder home(s)
STL	WIRED	ComputerGraphics.Stl (StlReader/Writer) + Mesh3D.StlIo - DUP
OBJ	exists ×3	MeshLoader.ObjReader · Asset.ObjLoader · Mesh3D.ObjWriter
PLY	exists	Mesh3D.PlyIo
glTF	exists	Mesh3D.GltfReader
MTL	exists ×2	Mesh3D.MtlReader · Asset.MtlLoader

image rasters get one ImageSniffer; meshes get none - the same universal-opener gap, one dimension up.