[nomel]

I asked the vendor if they had a 3d model viewer, so we could inspect a part they were making. He sent me a PDF. Full pan, tilt, zoom, and hideable pieces. I don't know what kind of witchcraft was involved, but I suspect OP will come out of this cursed by its unholy nature.

[mkl]

Most PDF viewers don't support the 3D models feature, and just show a static image (literally an embedded image; they don't look at the 3D data at all). I've used it to make 3D diagrams for multivariable calculus, done with Asymptote (https://asymptote.sourceforge.io/).

[IshKebab]

PDF has a load of advanced features - 3D models, video, Flash. Basically only Adobe supports any of it though.

I wish more readers supported video but IIRC the standard doesn't actually support a normal modern format.