CompuServe Messages

I've been itching to dabble a bit into Ray Tracing, but one of the most important requirements for me is the capability to stop the trace in the middle and continue from where I left off at a later time. This feature is hard to come by, but someone pointed out to me that DBW Render could do it (although it would have to repeat 4 lines…). Well, I downloaded it from DL9 here and it does indeed do that. But it also often crashes for unknown reasons. Checking the version, I see it was 1.0, January 1987. Does anyone know if Mr. Wecker has done any later versions? And if so, can he still be contacted at the Colorado Springs address listed in the documentation? –>Steve Bennett