Quite frankly, as an owner of both Vue5 Infinite and Carrara5 Pro, I find that Carrara5 does very well for both indoor and outdoor scenes. Except for Vue's ability to generate unique individuals when populating a scene with plants & rocks, Carrara seems superior in almost all aspects. Positioning distributed objects in C5Pro is much more accurate. I also personally prefer Carraras real-world (3D world) terms used in the shader tool. Vues abstract function driven tool is powerful in its own right, but uses terminology more appropriate for a mathematics programmer, than a 3D artist. Im good with math (I have an instrumentation hardware technology background), but I do not like such abstractions put into a program presumably designed for digital artists.

As for terrain generation -- I've started importing Carrara generated terrains into Vue, because Carrara's terrain modeler works that much better for me. If you want to simply do drag-'n-drop artwork (nothing wrong with that) then Vue is pretty fair, but, in my non-humble opinion, not worth the price of admission.

On the other hand, Ive started using Vue to generate a variety of plants, to be imported into C5Pro for distribution.

Carraras renderer is totally beyond Vue. I can render high quality scenes in C5Pro in one day that would take Vue a week to render! Even then, the C5Pro results always seem superior.

BTW, C5Pros network rendering is probably not quite as easy to setup and use as Vues, but it is much more reliable for large renders.

If I had to choose only one of the two programs Vue5I or C5Pro, I would take C5Pro any day!