Hello All!    This was my third tests, using the eco-system of Bryce Beta 7.  There is beginning, many bugs appeared, until that I learned how to dose each tool  of the echo-system of Bryce, because if he/she has a very high value, a "Crash" and you will cause will lose your work.  Each object that you to increase in the scene, save the project periodically, how many times doesn't matter goes need.   When it applies an eco-system, go applying little by little and saving, this way, you will avoid the "crashes."  I built this scene after 7 hours of test, because a crash happened and logically, I lost the last command. Everything built in Bryce 7, except for the atmosphere, I used a sphere mapped with a sky of 360th + configurations in the atmosphere of Bryce and several lights.  I wait to have helped and that have liked the result.    Anderson "Gendragon"