Carrara is a nice app. The majority of the images in my gallery (all of them in fact, until Poser 6 came out) are rendered in Carrara. For the price it's got quite a lot of nice features, and it's considered to be a relatively quick render engine as well. Version 5Pro is especially nice when it comes to integrating poser content. I still need to install the update patch on my copy though--I understand it fixes a few issues relating to importing Poser content in "native" mode (as opposed to Transposer).