CGTalk - render resoltions

MikeRhone

03-07-2003, 02:46 AM

I figured I'de ask you render gurus:

I'm rendering 2 test scenes. One done at 720x486 ntsc, and the other done at double that and shrunk back down to ntsc standard. Im sure you can tell the obvious difference in quality.

720x486 Original (www.wingman.ca/thor/tric720.jpg)
720x486 Rendered double and shrunk (www.wingman.ca/thor/tric1440.jpg)

I am asking: Is that a good way to pull this scene off? Render it double and shrink it back down so the quality is still there? Obviously this is adding a large amount to the render times but I'll do it this way if its nessesary.

Thanks for your advice.

Mike R

Norb

03-07-2003, 02:49 AM

well, those images are, according to my browser, twice the ntsc res, and obviously since one is a scaled up image, you're gonna get artifacts. also if you render to jpeg format you're gonna get artifacts no matter what....i usually stick with pic's or tga's

MikeRhone

03-07-2003, 03:08 AM

Oops... :p

I've fixed the images. Refresh your browser now to see what I mean. I've posted these in jpg format for web viewing only. The originals are in tga though :)

You can see that in the tric1440.jpg image, the quality is noticably better than in the tric720.jpg one.

M

Heber

03-07-2003, 05:44 AM

i know its off topic but your scene looks very promising rhone , be sure to tell me when your done your reel . :scream:

beaker

03-07-2003, 06:09 AM

Your going to see a much larger difference right now because your scene is almost grayscale(duotone), so your going to get a much better image with the higher resolution one because you have gradients everywhere. There may not be as much of a difference once you texture the entire scene.

dmcgrath

03-07-2003, 08:30 AM

I disagree, I think the shadows will be cleaner, as well as the textures. Not to mention the antialising on the edges is a little better (that might be the compression, I cant tell). Shrinking it is a good way to go, as long as you aren't doing an animation. That would take forever.

Octagon

03-07-2003, 11:40 AM

Originally posted by Rhonedog
I

I am asking: Is that a good way to pull this scene off? Render it double and shrink it back down so the quality is still there? Obviously this is adding a large amount to the render times but I'll do it this way if its nessesary.

Thanks for your advice.

Mike R

i'd only recommend rendering at twice your output resolution when it's not possible to get decent anti-aliasing through the renderers built-in AA features (adaptive sampling, samples filters)

in fact the render twice the resolution - scale down approach stems from the time, as far as i know, when some rendering systems didnt support AA at all. so this was the only way to get AA.

matthias

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