Carrara is a jack of all trades and a master of none, least of all realistic landscapes. Vue is lightyears beyond Carrara in that department. On the other hand, Carrara is superior to Vue in modelling, uv mapping, animation, particles and so on... It's a great program for those who can't figure out Blender or who can't afford the professional level software. The one clear advantage is that you can access the Poser Runtime and use most of the content directly in Carrara.

Download my free stuff here: http://www.renderosity.com/homepage.php?page=2&userid=323368