Hi, I've just upgraded to Corel's version of Bryce4D. Upon opening one 168M file in particular, changing the sky values, (haze, sun alzmiuth etc) and then rerendering to screen, the file freezes or the program crashes. It appears to be some kind of memory related failure. Work other than the sky change seems not to affect the program. I seem to recall some mention of this bug in an earlier version. Any advice would be appreciated. TIA manowar