There is no integration between Artlantis and ArchiCAD, so, no, you cannot use Artlantis materials in ArchiCAD.
Artlantis, with its live preview (very live if you have lots of cores), is so insanely superior in ease of use and speed to trying to assign materials and render within ArchiCAD that it makes no sense spending even a moment thinking about materials, etc in ArchiCAD vs simply exporting.
Interesting that Maxwell might allow that, but just a waste of time IMHO.
That said, Maxwell appears to offer some features missing in Artlantis that are useful for architecture, notably displacement shaders.
Cheers,
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sequoia 15.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB