Install g3dviewer by entering the following commands in the terminal:
sudo apt update sudo apt install g3dviewer
Description:
3D model viewer for GTK+
G3DViewer is a 3D file viewer for GTK+ supporting a variety of file types by using the LibG3D plugin facility. Models can be inspected and rendered using OpenGL. Rendering options includes wireframe rendering, shadows, isometric view, specular lightning, and textures. . See 'libg3d-plugin*' for supported formats.
Homepage: http://automagically.de/g3dviewer/
Version: 0.2.99.5~svn130-5
Section: universe/graphics