I know what you mean about Bryce 5 as I am using the same version. I have had the same trouble with spotlights that seem to become overly attached to gels and keep turning them on even after I turn them off, save the file, close it and reopen it again later....viola the spotlight has the same gel turned back on again. The only solution I have found is to delete the troublesome spotlight and replace it with another one with the same setting (minus the gel of course). My longest render to date was one that took a full week to complete (169 hours over a 2 week period). I would let it render during the day and when I got home, stop the render save the file and close Bryce. In most cases, Bryce will save the render at the spot it was stopped and then resume the render from there when you hit the resume render button the next time you open that file. Caution though....as Bryce doen't always work the way you want it to in this circumstance as I have experienced Bryce not saving the render at the spot I stopped it, but starting the render process from the beginning, even though I hit the resume render button.