Cosmoscope DB

Appearance

.u3d

Universal 3D, an ISO-standard 3D model format commonly embedded in PDF documents for interactive viewing

Not yet supported

Format facts

MIME type
model/u3d
Apple UTI
custom
Stock Quick Look
no stock preview
Planned approach (census)
metadata-only
Icon hint
generic-icon
Prevalence
niche

Renderer note (from the census)

parse U3D header for mesh count

Census note

3D PDFs embed U3D; native macOS shows nothing for these standalone 3D files.

Gotchas: ECMA standard