[help] Noise problems on glass material

Corona Corona for Cinema 4D General
1

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?

sunbeer.jpg
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2

do u have caustics enabled?

3

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.

4

Caustics/dispersion combo?

5

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. :wink:

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6

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

So much to learn when you’re new to rendering in general, and Corona in particular.

7

No probs at all. We also have this if you need it. https://help.c4d.corona-renderer.com/support/solutions/

8

Why do you enable a feature if you don’t know what it does?

9

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?

10

Please keep soft if anyone ask anything…!

…

11

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.

12

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?

13

You can expect black and orange helicopters soon…