Hello!
I already have Vue 6 and poser 7,Vue 6 has awesome rendering and can easily import poser 7 creation,BUT its VERY SLOW when using radiant light or other lighting speciality on a non-poor PC (1.83 core 2 duo,2GB rams) specially when rendering poser hair!
My question is:
Does Carrara 6 give such beautiful rendering? Is it FASTER than Vue 6 when rendering complex lighting condition + poser character(V4)? Does it import poser 7 PZZ files?

http://tutengraphics.com/

This may give you parts of an answer.

Mmmmm it only has some screenshots from carrara 5!

Quote - Hello!
I already have Vue 6 and poser 7,Vue 6 has awesome rendering and can easily import poser 7 creation,BUT its VERY SLOW when using radiant light or other lighting speciality on a non-poor PC (1.83 core 2 duo,2GB rams) specially when rendering poser hair!
My question is:
Does Carrara 6 give such beautiful rendering? Is it FASTER than Vue 6 when rendering complex lighting condition + poser character(V4)? Does it import poser 7 PZZ files?

C6 is NOT significantly faster than V6 (except maybe on hair generated in C6). It should import P7 PZZ files (currently still broken, fix promised soon), but it will not handle external morph binaries, dynamic clothing. Transposer is available to fix some of these problems if you also have a previous version of Poser but it currently makes a mess of C6 hair if you want to import an animation.
Quality is something personal. For me landscapes are still best rendered in V6, inside shots in my opinion in C6. Overall the difference in quality is small (but so is the difference in performance).
My advise would be to stick with what you've got. It won't get better, ever, until we get even faster processors and more of them with lots and lots of memory (for an affordable price).

They're both excellent programs and I use them both in my daily workflow. To get around the slow Vue renders, I use the Render Ranch. You can't argue with 160 dual core machine rendering your project. If you plan to stick to rendering premade objects and beautiful landscapes, then you can stick to Vue 6 and be very happy about it. Vue does have the edge in creating beautiful landscapes. If you'd like to make your own content, pose characters directly in the program you're rendering with and be able to customize objects directly in one app., then Carrara is a good choice. Carrara does have a very fast renderer. But, like with any software, you can slow it to a crawl by over-setting the requirements for a scene. You can create awesome landscapes in Carrara. The reason I say Vue has the edge in landscapes is because it has better atmospheric controls and presets. However, Carrara has better clouds that render in all capacities whereas the Vue volumetric clouds only render in the spectral mode. Poser 7 - With Vue you don't have an option. With Carrara 6, you don't really need P7 since you can work directly with the characters and it's a little more streamlined work flow. Carrara doesn't have dynamic cloth though. So, it all comes down to the kinds of renderings you see yourself doing in the future.

I never use dynamic clothes,it's a waste of time,I use clothes as figures which are far more easy and faster to use.
About V4 hairs like for exemple 3dreams one are 100% rendered under carrara 6? because in vue 6 it's not always nicelly rendered

Buy both.  If you can't decide which one is the better, you probably will need both.