Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: octavtirziu on 2017-01-26, 13:35:22

Title: Creating Moire
Post by: octavtirziu on 2017-01-26, 13:35:22
Hello,

I have a client that keeps asking for more of the "moire effect"each time. Is there any way i can influence the settings to produce more moire ? because if not i'm going to cheat it in photoshop.
Title: Re: Creating Moire
Post by: Dionysios.TS on 2017-01-26, 14:20:23
Hello,

I have a client that keeps asking for more of the "moire effect"each time. Is there any way i can influence the settings to produce more moire ? because if not i'm going to cheat it in photoshop.

I think rendering the image in a highest resolution and then lower it down in photoshop should fix a bit this thing but I saw your model and I guess with all those pattern moire is inevitable...

Thanks,

Dionysios -
Title: Re: Creating Moire
Post by: octavtirziu on 2017-01-26, 14:24:26
my client is actually asking for moire :) .  It's an elusive effect also because it appears and disappears depending on the zoom levels
Title: Re: Creating Moire
Post by: romullus on 2017-01-26, 14:38:22
What a strange request :] Usually Moire is considered as unwanted artifact. You should take opposite actions than trying to fight Moire - render to lowest resolution you can, try to use smallest possible repeating pattern, lower or completely disable image filtering. That should guarantee a "nice" Moire for your client :]

Edit: might be worth to try to downscale already rendered image with nearest neighbour interpolation.
Title: Re: Creating Moire
Post by: romullus on 2017-01-26, 14:50:28
Just tested it - downscaling with nearest neighbour interpolation works indeed. if only you can afford such downscaling
Title: Re: Creating Moire
Post by: octavtirziu on 2017-01-26, 14:53:00
Strange indeed. I was now trying just that, rendering at a low res that would not make things ugly, set the filter radius to 1 and testing different image filters. :))
Title: Re: Creating Moire
Post by: octavtirziu on 2017-01-26, 14:54:55
"downscaling with nearest neighbour interpolation works indeed"

this is pretty moirey :)) how did you do it?
Title: Re: Creating Moire
Post by: romullus on 2017-01-26, 14:58:05
Photoshop image>image size, width&heigth 50%, resample->nearest neighbour. I did it twice, for a greater effect :]
Title: Re: Creating Moire
Post by: Dionysios.TS on 2017-01-26, 15:07:34
my client is actually asking for moire :) .  It's an elusive effect also because it appears and disappears depending on the zoom levels

Sorry for this, I read so fast before and I thought the opposite... :)
Title: Re: Creating Moire
Post by: octavtirziu on 2017-01-26, 15:09:45
Thanks,

This scaling thing works great. Never thought i would end up trashing my images on purpose, but i guess there is a first for everything
Title: Re: Creating Moire
Post by: maru on 2017-01-26, 15:09:56
That's a funny request indeed! What Romullus suggested seems to be the best "solution".
Title: Re: Creating Moire
Post by: TomG on 2017-01-26, 15:24:10
Does this mean there's a market for a new type of plugin, the Image Worsifier, guaranteed to downgrade the quality of your images and introduce as many artifacts as possible?
Title: Re: Creating Moire
Post by: romullus on 2017-01-26, 15:31:10
By the way, probably it would be wise to make copy of your image and downscale both with different settings - one with nearest neighbour interpolation for Moire and the other one with bicubic for the rest of the image. Then load both images into different layers and blend with masks.
Title: Re: Creating Moire
Post by: romullus on 2017-01-26, 15:33:53
Does this mean there's a market for a new type of plugin, the Image Worsifier, guaranteed to downgrade the quality of your images and introduce as many artifacts as possible?

Of course there is - CA, bloom, glare, flare, vignetting - all these effects are artifacts, yet we almost always want them in our renders :]