This is not answering your question at all.  But I'd like to ask you a question since I detect your knowedge on such.  Please explain in dumbed down terms (for me) the steps you take to render an image for large format print.   The only thing I've done is 8X10 photo paper format.  I think I've found a semi-local print shop that does ciclee (sp?) printing.  What and how do you recommend settings for larger format printing, say 16X20.  I know this is an old question probable ansewered dozens of times.  Tks Willie

I hope some one can answer the render to disk question for u.