If you have P5, you don't necessarily need to use Bryce to get a good landscape. Using the Hair feature you can create your own waterfalls in Poser and the potential looks are endless.
Are you tired of those pixel restricted space backgrounds? Don't worry, in this tutorial, you will learn how to create a planet in just some minutes, and you can create a planet with all the specifications you want. This tutorial is not only for background creation, you can look directly to your planet, and you can rotate it if you want to make an animation.