Regarding native support for 3D arcade models through QML / Qt 3D (which is definitely desirable because of Shockwave's platform restrictions, see above), the currently supported mesh format plugins are listed here (Qt 5):

This limits the models QMC2 will be able to render to the 3D Studio Max format (which is also available in Qt 4.8, but requires Qt 3D as an add-on). Not all models are available in 3ds max format, but most of them... and there are probably/hopefully converters for some of the other formats.

A mind is like a parachute. It doesn't work unless it's open. [Frank Zappa]