the way what in the heck is a bucket? LOL. Turtle...Your renders are just ...lucky? Bucket size is the amount of pixels or square that firefly renders at a time. Reducing the "square" by half(64,32,16,8,4) relieves your pc of brain power and gives it a better chance to finish a render. If a render just stops someplace and rendertab closes like it finished, just reduce bucket in rendersettings and try again. This is in P5 and P6. I'm just going on the info Ba gave. Could be many things...