I use the bryce terrain modeler to create seamless, complex compound curve meshes for machine parts. With the grayscale mapping control it's faster and more precise the the landscape modeler in Carrara. However, most of the modeling that I do is spline based which I do in Carrara; something that the current version of Bryce can't do. If the landscape isn't the focus of the image I use Carrara's tools; If landscape is THE focus (or at least atmosphere type of stuff) I'll use Bryce. The volumetric clouds in Carrara are outstanding though. Mark