t4_geom_convert is a tool that converts geometries from the MCNP input format into the TRIPOLI-4® format. It is capable to handle most of the idiomatic MCNP constructs, such as universes, lattices, macro-bodies and affine coordinate transformations. It also converts isotopic compositions and boundary conditions.
This image shows a cut of the C-lite model of the ITER fusion reactor . The MCNP geometry (courtesy of Jean-Charles Jaboulay) was converted to the TRIPOLI-4 format by t4_geom_convert. The plot was made with T4G.