Skies of Reality Volume Two & Fireflies

nDelphi

I recently purchased Skies of Reality Volume Two because of my research (I have Volume One as well). I learned recently that HDRI lights render faster in LuxRender. I am happy to report, myself, that it is true.

The problem is that I see Fireflies with these lights, a lot, and they multiply as the samples per pixels grows.

I have an outdoor test scene that I use to test and it has a water plane. I have gone thru most of the tips about Fireflies that I can think of with no results. Including what I have read here:

http://forumarchive.daz3d.com/viewtopic.php?t=164152&postdays=0&postorder=asc&start=340

I have toned down glossy materials, including settings some to mate. I am left with the water plane.

I am hoping to get some additional tips that might help me to get rid of them, or at least diminish them a lot.

Here is an earlier render with the regular Reality sun light. It has no fireflies. The scene obviously looks a lot better with the Skies of Reality lighting. So I am hoping to fix this issue.

cridgit

Redacted

nDelphi

cridgit said:

... it could take 2-3 days to clear up properly (depends on the speed of your machine).

The render has gone up to three hours, but I see Fireflies multiply not reduce. It just made me think, will 100 hrs really make any difference?

refsocrd1_aefdbd2b3a

With any unbiased render, the longer it runs the better it gets(generally).

on my dual core, it takes an average of 8-10 hours to get a good result with lux.
In maxwell, it takes about a week.

The firefly(artifact/pixelation) effect may be caused by the surface of the water, and the texture used for it.
Sometimes they are the render engine bouncing light a bit too much, and over compensating.

Have you tried the same image with different IBL's?
Set one for instance?
Or change the settings or textures on the water?

I'd try turning off the water then turn lux loose on it and see if that makes a difference to the artifacts.

You may want to let it render to about 3-5K s/p before making any adjustments first. then see what it looks like.

just my two cents.

nDelphi

refsocrd1 said:

The firefly(artifact/pixelation) effect may be caused by the surface of the water, and the texture used for it.
Sometimes they are the render engine bouncing light a bit too much, and over compensating.

It's definitely the HDRI that is causing the extreme level of fireflies in this render due to the water plane. It's close to 2K SP, it seems to be clearing, seems to (the fireflies are still pretty bad), will not know for sure if all will clear until about 4K or more. After that I will just kill it.

I do like it that the HDRI is faster than the regular Sun light that comes with Reality or the single mesh lights I have used on many scenes. I figure my next scenes, without a water plane, will definitely look awesome in less time than it has taken me in the past, so that's a plus.

nDelphi

cridgit said:

Its not a Skies of Reality or Reality or Lux problem - some scenes just have issues. I had 2 renders (out of maybe 150 total) that never really cleared up properly even after 100 hours.

It would appear that this scene is one of those helpless cases. I had high hopes after it got to 4.7K S/P. But then it didn't clear anymore after that, I got it to 7.7K S/P before stopping it.

Niffgor

Did you try to use the Reality Water Plane? Maybe it works better than the original one (just an idea)...

nDelphi

nachtmahr said:

Did you try to use the Reality Water Plane? Maybe it works better than the original one (just an idea)...

Yes, I am using the water plane that comes with Reality.