  DD4hep serves as a generic detector description toolkit recommended for
offline software development in next-generation high-energy physics~(HEP)
experiments. Conversely, Filmbox~(FBX) stands out as a widely used 3D modeling
file format within the 3D software industry. In this paper, we introduce a
novel method that can automatically convert complex HEP detector geometries
from DD4hep description into 3D models in the FBX format. The feasibility of
this method was demonstrated by its application to the DD4hep description of
the Compact Linear Collider detector and several sub-detectors of the super
Tau-Charm facility and circular electron-positron collider experiments. The
automatic DD4hep--FBX detector conversion interface provides convenience for
further development of applications, such as detector design, simulation,
visualization, data monitoring, and outreach, in HEP experiments.
