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Chaos Corona for Cinema 4D => [C4D] General Discussion => Topic started by: onehandisbroken on 2018-05-03, 20:41:15

Title: [help] Noise problems on glass material
Post by: onehandisbroken on 2018-05-03, 20:41:15
Hello!

Sorry if this has been adressed already. Just point me in the right direction if that's the case.

Anyway. I stumbled into a problem today when I rendered a scene with pretty strong backlight.


Look at the glass. There's this strange noise. How can i fix that?
Title: Re: [help] Noise problems on glass material
Post by: Eddoron on 2018-05-03, 21:00:45
do u have caustics enabled?
Title: Re: [help] Noise problems on glass material
Post by: onehandisbroken on 2018-05-03, 21:57:37
do u have caustics enabled?

No, but dispersion. Could it be that?

What exactly does dispersion do?

I saw a video from Shawn Astrom on YT where he created a lens that increased chromatic aberration, by making a glass material with dispersion.
So i feel that could make sense.
Title: Re: [help] Noise problems on glass material
Post by: Beanzvision on 2018-05-03, 22:00:41
Caustics/dispersion combo?
Title: Re: [help] Noise problems on glass material
Post by: Beanzvision on 2018-05-03, 22:09:28
If you want to create chromatic aberrations I suggest doing it in post ie: Photoshop. Dispersion is the separation of light (colour) as it's being scattered/refracted. See attached. It will also increase your render times greatly. ;)
Title: Re: [help] Noise problems on glass material
Post by: onehandisbroken on 2018-05-03, 22:29:55
If you want to create chromatic aberrations I suggest doing it in post ie: Photoshop. Dispersion is the separation of light (colour) as it's being scattered/refracted. See attached. It will also increase your render times greatly. ;)

Ah, thank you for the ELI5! :) I have unchecked dispersion now.

So much to learn when you're new to rendering in general, and Corona in particular.
Title: Re: [help] Noise problems on glass material
Post by: Beanzvision on 2018-05-03, 22:38:00
No probs at all. We also have this if you need it. https://help.c4d.corona-renderer.com/support/solutions/
Title: Re: [help] Noise problems on glass material
Post by: Eddoron on 2018-05-04, 07:27:28
Why do you enable a feature if you don't know what it does?
Title: Re: [help] Noise problems on glass material
Post by: onehandisbroken on 2018-05-04, 09:44:23
Why do you enable a feature if you don't know what it does?

I used a glass material with dispersion enabled on some earlier renders. There were no noise problems in these renders.
I liked the way it made the glass look, although not knowing exactly what it does. Makes sense?
Title: Re: [help] Noise problems on glass material
Post by: iacdxb on 2018-05-04, 13:54:47
Why do you enable a feature if you don't know what it does?

Please keep soft if anyone ask anything....!

...
Title: Re: [help] Noise problems on glass material
Post by: houska on 2018-05-04, 14:15:33
Please keep soft if anyone ask anything....!

Yes, please, let's all be nice and soft and fuzzy!

Seriously though, there's nothing wrong in trying out stuff and there's nothing wrong in asking either.
Title: Re: [help] Noise problems on glass material
Post by: Eddoron on 2018-05-04, 15:32:07
I am nice, it was just a question. I've been a lot harsher in the past. By God....is it now offensive to ask? Is someone from the ministry of love coming to knock on my door soon?
Title: Re: [help] Noise problems on glass material
Post by: houska on 2018-05-04, 15:48:01
I am nice, it was just a question. I've been a lot harsher in the past. By God....is it now offensive to ask? Is someone from the ministry of love coming to knock on my door soon?

You can expect black and orange helicopters soon...