Reflection from mirror causes noise

[ous_gt]

Thanks for all your interest. So if the problem is not the placing of the portals, what is?

Portals weren't placed nicely at first, but while you're looking, i fixed it already. So that shouldn't be the problem.

Actually i'm gonna ask a real simple question. If your albedos are fine, how money passes should it take to clear the image?

If it's taking too long to clear up, what can be the reason besides albedo?

I thought it was about 150 passes. With this scene it almost clears up at 300 passes. Is this normal?

I've tried to render a high res. one, about 3800*2100. It was OK after 250 passes but it took 9 hours.

Now i'm testing it with the same settings with the res 1920*1080. Let's see when it clears up. Maybe i fixed it already somehow.

[Ondra]

This new for me! How work portal algorithm?
Ah, maybe,  portal farction is work here (0.75 default)
How work portal fraction? Why default = 0.75?

Corona uses multiple importance sampling (MIS) to optimally combine direct light samples from BRDF and from lights. This means, that even when one of your strategies is completely or partially useless (because of incorrectly placed portals), the other strategy compensates for that. So the rendering stays unbiased and still gives good results.

Portal fraction is the fraction of samples fow which to use portals. Higher = portals have bigger effect (either positive or negative). Values between 0.25 - 0.75 are conservative, meaning your render will probably not go wrong (slow) because of portals.

[Polymax]

Ok, thanx for the clarification, now I understood.

[rafpug]

In the second picture i attached, almost everywhere is noisy. Try to zoom in on your smartphone. I mean it's not that bad, but after 250-300 passes, i expect it to be clearer, and the thing is, it never gets clear. No matter how long i wait. So i need to change something obviously, but i don't know what. I've tried to change almost everything in the settings but didn't help.

Hello ous_gt
Yesterday I did some tests!

Gradient Maps to glossiness (... play with dark colors, and review the settings right...)
 
These days I have little time for a job that expires


We read them in the next

Greats
Raf