How does one make fireflies on the eyeball go away?
RAMWolff
Posts: 10,373
I'm happy enough with my render but then noticed there were fireflies on the sclera ... no likey that!
How can I fix it. It's an iRay render...
Thanks!
Richard
Post edited by RAMWolff on
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Comments
Well, if you cannot use a different eye in your model that does not show the fire flies, I would suggest using Photoshop to remove them. Sometimes a little post work is needed as a last resort.
Hmmm, I'd rather have proper settings adjustment setting shared with me so I can learn how to set up eyes better.
Wow, I totally misinterpreted that title... I was going to say either bug spray or a fork.
EDITED TO ADD... I tested it with live crickets... Both are suggestions are very painful... Not a good solution.
LOL You funny man you!
I even went over to the Fiddling with iRay Skin Settings thread and carefully set up the eyeball with the settings from the very first post which the OP posted and was happy with. Still geting the intense fireflies on the white of the eyeball! I'm sure it burns and itches so she really wants relief!
Longer render...it's not quite finished yet. Either up the time or iterations in the render settings.
Richard, try setting translucency to 0. Then readjust from there.
Hi,
Sorry, slept really bad last night so needed a nap.
SO there is no translucency on that I can see in all those millions of options and I have NO IDEA how to make the render go longer. I looked in the Render settings, carefully, but can't see where to add more time to it. Looked under the Advanced settings too... Even tried the Painters Lights Neutral settings and now the fireflies are worse! lol
Happier with the skin and the lighting but the fireflies are still present. Need that info on how to set the render to a longer one to over come that.
Thank you!
Richard
Ramwolf to extend the length of a render there are several options. Go to progressive render on the render settings tab. In some cases you may have to: Increase max Samples and max seconds and change the render converged ratio to 99% (not 100 as there is no such thing and it gives the program a stroke).
OK we/I need to know what figure this is and does it have a Eye Surface over the entire eye. Also how much gloss do you have on the sclera. Spooky posted some eye settings a while back and I can't seem to find the darn post now.
I think I got it figured out. The Sclera was set up with Fresnel but when I changed it to Reflectivity the flies went away.
OK. I was wrong. On a spot render it was better. Full render the flies are still there. I tried increasing the render times, thank Khory, but that didn't help. This is for Dawn from Hivewire. So instead of the surface being named Sclera it's just called Eyes. I've double checked the settings like bump and displacement. This is my skin I'm working on. The eye surface has a displacement set up to bring out small veins in the eyeballs, I tried reducing that, nope, that wasn't is. The bump is really low so not thinking it's that either.
Here are the eye settings.
MAN there are allot of options these days. Too much. Wish they would set up the Surfaces tab to auto hide unused sub options... YIKES!
You can't hide them but you can select just the ones you want to work with at the time. Just hold down the ctrl key as you click them I think. Can't check as I have a promo rendering.
Thanks for the tip Khory!
I would try to get rid of the top coat (Top Coat Weight to 0.0), you don't need that for the sclera, Richard, not as long as a separate spec map is used in glossy channel. Also I would set the converged ratio to 100%! - Some areas only clear up after 99.5% or even higher. That with the 100% and Studio or the renderer crashes is a myth actually.
If all your tries fail, take a look at one of my Iray M4 updates for the eye settings, although I don't know the exact eye geometry of Dawn it could give you a hint of what to do.
Why are you seeing all those settings for the Material? Half of them shouldn't be visible because they are not active.
Avoid Pure White (1,1,1) whenever possible. Its okay if you have some map modulating it, but... I can't tell what is active and what isn't so I'm not sure what the problem is.
Because he has activated "Show Hidden Properties" for that Tab, to me it would be too complex to keep the overview, but some prefer to work that way.
Avoid not just pure white but also pure black for PBR type shaders. Even the driven snow is not pure white and lampblack is only a very dark gray.
Assuming the Firefly filter is on, and the Caustics filter is off, the fireflies are probably caused by a number of things, including a gapless interface between two thin-walled (zero depth) geometries, the use of pure white, and high reflectivity.
nVidia has a short page on avoiding fireflies:
http://irayrender.com/fileadmin/filemount/editor/PDF/iray_Performance_Tips_100511.pdf
Go down to page 6.
On the interface issue, the flies can appear if you choose the same (usually reflective) shader and settings for both the eye surface and the cornea. On many characters, these are zero depth geometries flat against each other, and both are designed to reflect. What seems to happen is that Iray gets caught up in some "ping-ponging" in the ray tracing, as the internal surfaces bounce light off one another. This results in the high frequency noise. Since you usually don't need a reflective cornea as well, try removing most/all reflection there, and go with just a reflective eye surface for showing highlights/catch lights.
Havn't fully read that yet, but RICHARD! Don't blame someone else for your own faults, every tab in DS is set up with the unused properties HIDDEN, you maybe don't remember, but you have to have that option manually activated at some point. On the left upper corner of every tab or pane is the option symbol (four white lines with a small triangle), click on it and see if there's a hook on "Show Hidden Properties", get rid of that hook by clicking that option again and all the unused shader options in the surface tab are hidden again. This option is available for every tab/pane separately. I often activate that for instance for the parameters tab to be able to manipulate some feratures that are usually not available, like the translation for the different genital segments on G3M gens for instance. ;) But usually you better work with all the options hidden, it's too confusing for most of us.
Thanks for the tips. I'm not sure, with the iRay setup (I'm WAY behind getting going with iRay, health stuff) where to put the spec map. There are SO many options now for Spec and Glossy... OH MY WORD!
On a side note I don't have the show hidden selected, for what ever reason my surfaces show all channels even if some main parent is set to zero . Like when I put the Top Coat Weight to 0.00 and everything under it grayed out, it's still visible for what ever reason!
So I'm taking a gander here and thinking the spec map will work under the Glossy Color channel or should I use the Glossy Lyered Weight channel to load the spec map?
It doesn't make a big difference from my experiences, but when you load the spec map, you should also add a bit of top coat glossy, that depends a bit on how the spec map looks. And yes, a lot more optons and refinement is possible now. :)
Thanks,
Just wish I could figure out how to hide the unhidden bits that are NOT supposed to be unhidden when the parent function is set to 0.00. Not sure if it's a bug or some other setting I'm not aware of. Here is a screen grab of the Surfaces tab drop down menu... There is no Show Hidden checked off...
I'd chime in but I don't have Dawn RAMWolff and you are in good hands here. :)
Thanks just the same. :-)
Have you already tried to re-install DS again? - Maybe that helps? But I'm at a loss here too, to be honest.
No, not tried that. At this point I guess I'll just wait for 4.9 to hit and do it then!
The issue with the hidden settings try refreshing your Workspace and then restart DS
Running into another issue with these eyes. I'm not sure if it's the Cornea or not but there is hardly any of the true Iris color showing through, very milky looking. Can someone tell me which of the kazillions of surface settings I need to be looking at to get this unwanted effect toned down or gone? No likie at all!
Thanks so much
Richard