With the releases of 3D Bryce 6.0, DAZ productions has released the older version 5.5 for free.
Create breathtaking realistic 3D landscapes and animations with DAZ 3D Bryce. The easy user interface simplifies the design process for a novice or the seasoned professional. Start out building or importing a landscape as impressive as the Grand Canyon. Populate it with buildings, people or any other object you create or from the extensive DAZ 3D library. The Light Lab provides you robust control over your sunsets, moonlight nights or high-noon ambiance. Tree Lab allows you to plant your landscape like the gardens of Versailles.
Lost River Canyon by estevez, created with Bryce
Download 3D Bryce 5.5 from Download.com.
To get the free Bryce serial number, you will have to register here.