Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] General Discussion => Topic started by: Polymax on 2013-03-24, 07:09:44

Title: Tip!
Post by: Polymax on 2013-03-24, 07:09:44
Hi all!
Discovered an interesting thing, if the diffuse map to use a bitmap with obvious noise, the smoothing error occurs.
To avoid this, use "Summed Area" filter in the bitmap parameters.
Title: Re: Tip!
Post by: lacilaci on 2013-03-24, 12:01:40
The whole filtering in corona is somehow weird... I don't know maybe it's just me but it feels somehow wrong, I'm pretty busy right now so can't do a proper tests but image filtering, texture filtering and when it comes to bump mapping it's all just weird... Anyone experiencing some stuff like that compared to other renderers?? Or am I seeing stuff? :D LOL
Title: Re: Tip!
Post by: Chakib on 2013-03-24, 16:22:49
Quote from: Polymax on 2013-03-24, 07:09:44
Hi all!
Discovered an interesting thing, if the diffuse map to use a bitmap with obvious noise, the smoothing error occurs.
To avoid this, use "Summed Area" filter in the bitmap parameters.

i've read if you use the summed area filter your render time will double, so it's not a big deal.
Title: Re: Tip!
Post by: Polymax on 2013-03-24, 16:28:13
Quote from: Chakib on 2013-03-24, 16:22:49
[i've read if you use the summed area filter your render time will double, so it's not a big deal.
My tests have shown, this is a wrong statement:
http://forum.corona-renderer.com/index.php/topic,316.msg4726.html#new (http://forum.corona-renderer.com/index.php/topic,316.msg4726.html#new)
Title: Re: Tip!
Post by: Chakib on 2013-03-24, 16:36:04
Quote from: Polymax on 2013-03-24, 16:28:13
Quote from: Chakib on 2013-03-24, 16:22:49
[i've read if you use the summed area filter your render time will double, so it's not a big deal.
My tests have shown, this is a wrong statement:
http://forum.corona-renderer.com/index.php/topic,316.msg4726.html#new (http://forum.corona-renderer.com/index.php/topic,316.msg4726.html#new)

will test it also, this is weird because the other guy did also a test and the differente is huge.

Anyway thanks for the tip !
Title: Re: Tip!
Post by: kumodot on 2013-03-24, 18:39:00
Summed area seems (to me ) to have a bigger impact on the REnderTime using Scanline and Mentalray, but the textures looks better.
 
   The first thing i´ve learned using Corona is to put Blur texture filtering on ZERO and check summed Area. It solved all my problems with textures. I didn´t notice a great impact on render time... I am not sure.
Title: Re: Tip!
Post by: Ondra on 2013-03-24, 19:06:02
spoiler alert: in time I'll implement my own bitmap texture with an optimized sampling/filtering, the max one is always slow.
Title: Re: Tip!
Post by: maru on 2013-03-24, 19:45:27
Max is about to become a Corona plugin. ;)