Even during rendering there is a difference between "soft images" and "hard gradients images". Recently I was working on a picture with high contrast, and Vue was not able to antialias in the zone of very strong contrasts (in a very good rendering mode). I think there is a problem to print a poster you are obliged to render in a very high quality mode : you can't spend days and days to render very big sizes. In that case, interpolation must be considered, I suppose. Since it may be impossible to use lesser quality for the render. When a high quality is not an obligation, there is no problem to render very big sizes. For the "fractal" programs I'm very curious to see their efficiency ;=) Yves