Ten Bryce 7 Pro source files featuring volumetric clouds. Important note. Most of these scenes would take between half an hour and an hour to render on a P4 3.4ghz powered PC or about 5 minutes on a i7 system. Volumetric clouds are demanding on your system, do not expect instant results!
This product includes the initial cloudscape put together in this video Bryce 7 Volumetric Cloud Tutorial 1, along with nine further examples expanding upon the methods already outlined.