Corona 1.7 rc5 - white dots

[Scuffi]

Hello to all
I'm doing tests with 1.7 rc crown 5 and I noticed that there are white dots scattered around the image.

[Ryuu]

I'm sure there are many other ways to get rid of fireflies, but the simplest one would probably be to try and use denoising.

[Scuffi]

hello Ryuu
denoising is active

[romullus]

Try not to put bright light sources near very reflective surfaces, or if you have to, then use exclusions or rayswitches.

[maru]

-How many passes is this?
-Is this beauty element, or some other?
-Are you using LightMix here?
-By looking at other parts of the image, it looks like denoising is not active, or denoising amount is set to 0 or some very low value.

[Scuffi]

size image 3600x2700
passes 40
do not use LightMix
if you increase the value of the decrease deoising white dots but lose other details that interest me

[Scuffi]

open and in photoshop are almost gone: O
Now I make a longer rendering.
thank you all

[PROH]

@Scuffi - Do you know that there is a "remove fireflies only" mode in the denoiser?

[Scuffi]

Use Corona recently and I'm not ashamed to tell you I do not know how!

[Scuffi]

I did a little research and I found out now, I think how the DeNoiser.
I'm rendering the image and I have to say that 125 pass virtually disappeared white spots.

Thanks for your help

[maru]

The dots are probably caused by light shining on the metal/glass parts (caustics). One idea is to use the rayswitch material to exclude the reflective/refractive materials from GI calculations: https://coronarenderer.freshdesk.com/support/solutions/articles/5000529341

[Scuffi]

Here is the final image (200 pass 1h47Min render time) without DeNoiser.

thanks again to all.

[tomislavn]

That sofa on the right is floating in the air btw :D

[Njen]

Do you mind sharing your shader setups for your fabrics?

[Scuffi]

sorry but yesterday and today I'm out to try to find some work. Monday as soon as I return to the office I write you all the details of the material !!!