Well, maybe the message is that the whole thing is not linear? Which is not a big surprise really because the amount of pixels that has to be handeled grows quadratic. Height AND width. Most people forget that. The problem you are facing as well is, that if you blow the model up so heavily you reach the limits of it. Even in the sections you showed here you see already that for example the corona looks jagged because there are not enough polygons. The limits of polygon based renderers. AND of course, with so many refelctions and mirror effects a ray tracer really has fun - and wants to stay as long as possible - lol. Seriously, all these effects cause a hughe amount of calculation work. I am more surprised that a 3,500 pixel high image only needs 4 hours. That is the surprising message here. You must have a damned fast machine! :-)) Walther

One day your ship comes in - but you're at the airport.