Hi
There is no such native libraries in Java3D 1.6.0-pre12 because the native renderers based on OpenGL and Direct3D were removed several years ago because they were difficult to maintain and the latter was particularly buggy. Java3D 1.6.0 relies on JOGL to access OpenGL.
I can contact Dassault Systèmes if necessary. Does techviz require this native library? If so, it will have to be modified in order to work with the currently maintained version of Java3D instead of relying on an obsolete one.