i do facade designs in catia v5 but am facing problem in rendering . can you suggest best rendering software so i can import catia files and render into it ?
have you tried to render it in CATIA?
It is hard to suggest something without seeing an example of what you are trying to do.
If Catia has a built in rendering option like Jack suggests, then it may be worth a shot.
Many users on this site like Keyshot.
There are dozens of rendering option to choose from, post some examples of what you are looking to do and someone will have a good suggestion.