Author Topic: antialiasing best settings  (Read 1898 times)

2017-02-08, 01:01:10

Marvey

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Hi there,

I am doing renders at big resolutions like 11811x8105 and i need to have the best antialiasing since the client will zoom max he can and he is looking at all inperfections, my question is what filter/and values,  should work best for these resolution?
I hope someone can help, thank you

2017-02-08, 02:05:28
Reply #1

cecofuli

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The default settings =)
And, if you have AA problems, like jagged edges near very bright pixels, you can change the highlight clamping between 2 - 10.

2017-02-08, 16:51:40
Reply #2

Marvey

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and wich filter Works betteR? Parabolic width 1.5 ? btw adding the clamping btw 2 - 10 will have some bad side doing it?
thanks
« Last Edit: 2017-02-08, 19:39:31 by Marvey »

2017-02-08, 19:58:19
Reply #3

cecofuli

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Try by yourself =)
As I already told you, the default setting work very well. Don't change nothing if your images is good ;-)
Corona isn't V-Ray. AA in Corona isn't a problem.

2017-02-08, 20:14:20
Reply #4

SharpEars

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Try by yourself =)
As I already told you, the default setting work very well. Don't change nothing if your images is good ;-)
Corona isn't V-Ray. AA in Corona isn't a problem.

I would argue that you should use Symmetric Tent instead of Tent and Box if you don't mind a slight amount of blurriness. I don't know why Tent is the default and not Symmetric Tent.

Filter Type Executive Summary:

Symmetric Tent - for sharp AA
Parabolic - for middle of the road AA
Box - for maximum (but maybe blurry) AA
"the rest" - for highly scene problem dependent asymmetrical AA solutions

Use width to season to taste (or just stick with 2.0 for most reasonable resolution scenes).

None of the filter types will correct aliasing issues due to 0.0 intensity pixels next to 9.0 intensity pixels. If you suffer these "crazy-contrast" issues, use clamping, blurry glare, or post-processing. (Heavy) clamping will add bias, which may or may not be a bad thing depending on the artistic vs realistic nature of the scene (i.e., are we talking VFX or ArchViz?) and the sort of comping/post-processing you intend to do.

See my comparative analysis of the Corona anti-aliasing filter types at: https://corona-renderer.com/forum/index.php/topic,14613.msg93232.html#msg93232
« Last Edit: 2017-02-09, 17:17:37 by SharpEars »

2017-02-09, 18:31:10
Reply #5

Marvey

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thank you so much for the help!