In response to its number-one request, Nevercenter, has ported version 2.3
of its Silo 3D Modeler application to Linux, complementing the existing Mac
OS and Windows editions. Silo, popular with designers of video games,
movies and 3-D architectural applications, can be used as either a
standalone tool or as a versatile element of a multi-application 3-D
graphics workflow. Nevercenter is finding ever more studios and individuals
in this space moving to Linux. Silo's internals also have received
significant updates, including an updated windowing system and bug fixes
across all platforms, as well as added support for .stl import.
http://www.nevercenter.com/silo