...the sample file, with B6, using the spaceship, and the St. Peter's HDR file. Single yellow omni light added...

  
...MUCH brighter colors and SOFTER shadows with HDR- Bryce finally escapes its COLD and DARK look! ...(YES, I KNOW-- the color is NOT very SUBTLE, heh!)

HDR is the best thing to happen to Bryce since version 4.1...!

Thanks to AgentSmith also for suggesting some good HDR render settings so that I could complete this render within one hour!