Ray tracing is the gold standard for microwave channel modelling. The lack of a comprehensive material library and ray tracing implementations capturing both surface scattering and atmospheric absorption represent a barrier for the use of ray tracing at millimeter-waves (mmw) and TeraHertz (THz). We report here a ray-launching algorithm implementation that includes a library of microwaves-to-THz material properties, surface scattering and atmospheric absorption that enables us to benchmark a 0.3 THz experimentally-validated THz ray-launching model against a microwaves one in the context of a meeting room 0.45 THz wireless system.