So far I can't see any difference in Bryce sun vs. TA in certain outdoor lighting(but is does make brighter scenes for other). HDRI simply ruins the outdoor shadows for heavy daylit scenes, so, Im going to stick with the default sun for now, unless anyone has tips on HDRI w/default sun suggestions. HDRI is still tooo slooow for previewing complex outdoor scenes. Bryce can get very close to Vue for alot of things, if Bryce only had a brighter sun, or did I miss a setting.