Take a look at the
Reflection with Cube Maps page in the Vizard Help for instructions on adding the map in Max. To get the cube map to best match the Vizard scene, you can capture the map in Inspector rather than Max. See the
Saving Cube Maps from Inspector article for more information.
Another option is the GLTF workflow in which cube maps are no longer considered a part of models, and instead are part of environments. This makes is so if you have many props, you don't have to do a new export for every environment you want to bring them into.