Vray manual states that sub-pixel mapping shoudl be off to get more realistic results… but when I have it off I got white noise problems and pixelated edges on bright objects (especially white reflections). How do you guys deal with it ? I read on Peter Guthrie blog that he’s using sub-pixel off … …

whats more…try to render with alpha and subpixel on…yuck its a puzzle for me too :slight_smile:

who knows.. :slight_smile: but I guess there’s probably nothing fancy about it. just colour mapping, limit materials/reflections brightness, and render to a high enough resolution so that even aliased edges look ok once printed or down sized on a monitor..

[image] Share your models here with Vray settings whats more…try to render with alpha and subpixel on…yuck its a puzzle for me too :slight_smile: yeah, alpha is horrible !

tried to render 10k image beacause of that…it wont sort the issue of the alpha. wonder why this is…

[image] Interior tried to render 10k image beacause of that…it wont sort the issue of the alpha. wonder why this is… I never check subpixel mapping, what’s the problem with that and alpha channels?

the alpha channel comes unfiltered and without any antialiasing…basically pixelated so then you get a situation where you have the contrast between the building and the sky backplate you put in in post, youll see really ugly pixelation on the edges. will post an example when i have a second

Can you get me an example for the alpha issue? I’m not sure it should be happening… Otherwise, having the sub-pixel mapping on might produce different brightness of some effects like glossy reflections, especially if you use the universal settings or some variant. Some people use sub-pixel mapping,…

So, are you saying that you must render images bigger than a certain size, to use subpixel mapping? And maybe then re-render the alpha channel without it? It’s a bit confusing… by eye, I must say that generally images are better with subpixel mapping checked, even if the log says the opposite.

[image] On another topic It’s a bit confusing… by eye, I must say that generally images are better with subpixel mapping checked, even if the log says the opposite. It says that they may be incorrect, not that they will be worse :slight_smile: The two things are not the same. Best regards, V…

what is the trick to render corrctly with sub-pixel mapping off?

V-Ray for 3ds Max V-Ray for 3ds Max :: General

PIXELBOX_SRO December 13, 2011, 9:21pm 6

BTW…PG doesnt seem to render anything that comes with alpha…he renders images together with background which is mostly a backplate from one of his EXRs/HDRIs

scene size and limitation . Experience feedback please

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what is the trick to render corrctly with sub-pixel mapping off?

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