Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: OJ on 2020-01-15, 09:54:24

Title: Weird artifacts on Caustics pass.
Post by: OJ on 2020-01-15, 09:54:24

I was trying out caustics yesterday and left a test image to render overnight. This morning after 1034 passes The image looks clean but in the caustic pass there is strange pixelated effect going on.
I attached couple of screenshots and passes from the render if that helps.

Title: Re: Weird artifacts on Caustics pass.
Post by: rowmanns on 2020-01-15, 09:59:12

Hi,

Would you be able to send over your scene so we can investigate?

Thanks,

Rowan

Title: Re: Weird artifacts on Caustics pass.
Post by: OJ on 2020-01-15, 10:21:05

I archived the file. It can be downloaded from google drive:
https://drive.google.com/file/d/1A_psPTT_De6_8IPX562yPUidV93dQCTO/view?usp=sharing

My computer specs are:
i9-9900k 3.6 GHz
64 GB ram
GeForce RTX 2080
Windows 10 64 bit

Title: Re: Weird artifacts on Caustics pass.
Post by: rowmanns on 2020-01-15, 13:56:51

Hi,

I forgot to ask the golden questions.. Which versions of Max and Corona are you using?

Thanks,

Rowan

Title: Re: Weird artifacts on Caustics pass.
Post by: OJ on 2020-01-15, 15:15:44

3ds Max 2019.3 Update
Corona version 5

Title: Re: Weird artifacts on Caustics pass.
Post by: rowmanns on 2020-02-04, 10:37:58

Hi,

We can reproduce this behaviour here, I will speak with the dev team to find out what is causing this.

Thanks,

Rowan

(Internal ID=445724907)

Title: Re: Weird artifacts on Caustics pass.
Post by: OJ on 2020-02-05, 09:52:34

Thanks a lot!

Title: Re: Weird artifacts on Caustics pass.
Post by: rowmanns on 2020-06-18, 16:34:53

Hi,

It looks like this was caused by some caustics optimisations.

We have a workaround for this now. For the time being you can disable the "Caustics Adaptivity" checkbox in the advanced caustics settings. We will carry on looking into this and try to find a more permenant solution.

This in present in the v6 DB from 2020-06-18 onwards.

Thanks,

Rowan

Title: Re: Weird artifacts on Caustics pass.
Post by: maru on 2020-06-19, 17:35:38

P.S. you need to enable the development / experimental stuff rollout first - https://coronarenderer.freshdesk.com/support/solutions/articles/12000021288

Title: Re: Weird artifacts on Caustics pass.
Post by: maru on 2023-03-01, 12:04:40

fixed with v10 caustics improvements