Not sure yet. It has a different environment editor than before and works a totally new way. So don't know how to set my old windlight settings to work. =( But on the upside, I could once again crank my settings back up. With the 2.7.4, I couldn't turn on lights and shadow, because my scene would go total black! I was able to use ultra settings with lights and shadows with previous versions of Viewer 2. Now I could run those settings again with the beta viewer! Just need to figure out how to use the new environment dodad.