When you register for a Cornucopia3D account (the free Vue community site), you can participate in the free Open Beta test for Vue Pioneer, the entry level version of the powerful landscape and environment modeling, rendering and animation software. Versions are available for Windows and OSX, in both 32-bit and 64-bit. Information at http://www.cornucopia3d.com/products/vue/vue_7_pioneer . You may keep the full version, but some limitations apply: renderings up to full HD (1920x1080), with a Vue Logo no loading of external models (except when bought from Cornucopia store no commercial usage allowed The first and last are fine for students, but the second makes it impossible to use for architectural designers when modeling in CAD software... so they might as well go to one of the more complete versions.
Info on BIM, CAD & 3D software for architects and students