Resolution size vs rendering passes

[Ian Foster Griffith]

Hi All

Question:- I'm looking for an option about how to get the best image for my time.

Do I choose a small pixels resolution and up the render passes to get the best image or large pixel resolution and as many passes as time allows. There has to be a sweet spot.

At what resolution size does nxt start have negative effect on time.

Case 1 single rendered image

Current job is a window lourve for a client (500mmx500mm) no background. . Using studio in lighting (looks great). 42 separte images required. Resolution is 3000x3000 pixels. get image I want after 12-20 passes. 25 mins per render. Producing for a A4-A3 data sheet print.

Comment - I feel like a should dumb down the res and up the passes and save time? Will I get a better image for time ratio.

 

Case 2  animation for web based fly around (same image)

Again the job is a window lourve for a client (500mmx500mm) no background. . Using studio (looks great). 42 separte images required. Resolution is 800x800 pixels. get image I want after 10 passes. 24 shots to made the movie. Producing for a website movie .

Comment - Again what is the sweet spot with resolution vs passes?

 

Info - Computer AMD phenom quad core 965 with 8GB Ram, both 32bit and 64bit windows running.

 

Thankfull for your comments on this issue................

 

 

Wish list

A "scale to fit" button in the rendering pass box of the walkthur would help. When I use the zoom in and zoom out button never get it to fit right.

 

[Roy Hirshkowitz]

Rendering time is linearly proportional to the number of pixels.  Multiply both image dimension in pixels to get this number.  For example-- 3000 x 3000 gives you 9,000,000-- 800 x 800 gives you 640,000.  Expect the first example to be about 14x slower than the second.

Don't know about a sweet spot.  9 MPixels is rarely a good idea-- I would definitely try to avoid that.  You can upsample in PhotoShop before printing.

[Ian Foster Griffith]

Roy

So bring down the resolution A.

Will try a test and see if the results are same will more passes.

 

thank

Ian