Tips to reduce fireflies?

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afecelis
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Tips to reduce fireflies?

Post by afecelis » Tue Nov 17, 2015 4:08 am

Hi guys,

Working on another scene I notice that wherever sunsky hits any glossy or nk material lots of fireflies get generated and take forever to clean up.
Image

I'm using bidir+MLT with exit portals outside the windows. Any ideas on how to reduce them?

regards,

Alvaro
AMD Ryzen 7 1800 @3.6ghz, 32GB ddr4 3200 mhz Ram, 2X Nvidia Gtx 1070 8GB, Win10/Elementary OS 5.0 Juno (ubuntu 18.04), Blender/Sketchup/Modo/Cinema4d

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afecelis
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Re: Tips to reduce fireflies?

Post by afecelis » Tue Nov 17, 2015 5:10 am

I just ran into this thread:
http://www.indigorenderer.com/forum/vie ... =7&t=13645

Following Zom-b's tip of removing the exit portals is producing a less noisy image. Will post my progress soon ;)
AMD Ryzen 7 1800 @3.6ghz, 32GB ddr4 3200 mhz Ram, 2X Nvidia Gtx 1070 8GB, Win10/Elementary OS 5.0 Juno (ubuntu 18.04), Blender/Sketchup/Modo/Cinema4d

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afecelis
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Re: Tips to reduce fireflies?

Post by afecelis » Tue Nov 17, 2015 6:28 am

Indeed removing the portals produced an image with less fireflies :D (specially on the chrome material of the chair). The lamps on the wall are reflecting some fireflies on the glass material of the window on the left.
Image

Other things I'm trying out on this image:
-IES lamps
-Better bump mapping on the floor
-Different lighting/material schemes

Still so much to learn, but I'm loving how "controllable" Indigo is ;)

cheers!
Alvaro
AMD Ryzen 7 1800 @3.6ghz, 32GB ddr4 3200 mhz Ram, 2X Nvidia Gtx 1070 8GB, Win10/Elementary OS 5.0 Juno (ubuntu 18.04), Blender/Sketchup/Modo/Cinema4d

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Zom-B
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Re: Tips to reduce fireflies?

Post by Zom-B » Tue Nov 17, 2015 6:32 am

regarding the Fireflies the forum searh is indeed your best sources of knowledge :lol:
Higher SuperSampling for less Fireflies helps too...

BTW: your cloudy background image doesn't fit to the sunlight in the scene
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afecelis
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Re: Tips to reduce fireflies?

Post by afecelis » Tue Nov 17, 2015 6:49 am

Thanks Zom-b :D You're right about the background image, I'll look for a better one, it's just that the city and the height the picture was taken from was something I felt fitted the interior, lol.

Question: Where do you set higher super sampling options?

Comment: nice portfolio! :D Is all your work rendered in Indigo? Including the animations? Is it too complicated to render animations with Indigo? Do images change a lot in their sampling from frame to frame? This is what worries me the most when thinking of animation with Indigo. That and the very long render times. I see you got similar PC specs as mine. How much does rendering with 3 machines like that speed up animations?

thank you for commenting.

regards,
Alvaro
AMD Ryzen 7 1800 @3.6ghz, 32GB ddr4 3200 mhz Ram, 2X Nvidia Gtx 1070 8GB, Win10/Elementary OS 5.0 Juno (ubuntu 18.04), Blender/Sketchup/Modo/Cinema4d

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Re: Tips to reduce fireflies?

Post by Zom-B » Tue Nov 17, 2015 7:21 am

afecelis wrote:Question: Where do you set higher super sampling options?
I'm on C4D, no idea where to set it in your exporter :oops:
afecelis wrote:Comment: nice portfolio! :D Is all your work rendered in Indigo? Including the animations? Is it too complicated to render animations with Indigo? Do images change a lot in their sampling from frame to frame? This is what worries me the most when thinking of animation with Indigo. That and the very long render times. I see you got similar PC specs as mine.
Yes 95% of the stuff is rendered in Indigo, also the animation!
The noise changes between the images are best thing that can happen, since by that you can denoise the animation with a temporal denoise very easily :)
In this thread I show some examples of the doising: http://www.indigorenderer.com/forum/vie ... =4&t=13085
afecelis wrote:How much does rendering with 3 machines like that speed up animations?
3 systems = 3 times the speed :D
There is some little CPU extra time for the master for the merging of incoming slave data.
polygonmanufaktur.de

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Polinalkrimizei
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Re: Tips to reduce fireflies?

Post by Polinalkrimizei » Tue Nov 17, 2015 7:54 am

Go to render panel, scroll down => Supersamples (be aware that supersampling is quite RAM-intensive, usually 4-5 gives quite good results already)

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contegufo
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Re: Tips to reduce fireflies?

Post by contegufo » Tue Nov 17, 2015 11:23 am

Hi

And 'in the upcoming version 4 of INDIGO rendering GPU.
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afecelis
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Re: Tips to reduce fireflies?

Post by afecelis » Tue Nov 17, 2015 1:32 pm

Thank you Polinalkrimizei! I almost couldn't find it! lol. You have to change the "Filtering" option to "Custom" for it to appear:
Image

Here's the image so far:
Image
I switched the floor tile and the wall concrete direction, rotated the rug 90 degrees, and changed the background to one more according to the kind of lighting in the scene. I still need to leave the render "cook" for some more samples for the glass to be clearer and get a cleaner background. But I'm enjoying working with Indigo very much.

@contegufo: ciao caro amico! :D
I'm very excited about Indigo Renderer 4, but I haven't found much info about it. Is it going to be very different from 3? I just purchased 3 and I'm only getting related and comfortable with it after a week of fiddling with its options. I hope 4 will be an easy transition. I really look forward to working more with GPU rendering. Is there an estimate release date?

once more, thank you guys, for all the help. :D

regards,
Alvaro
AMD Ryzen 7 1800 @3.6ghz, 32GB ddr4 3200 mhz Ram, 2X Nvidia Gtx 1070 8GB, Win10/Elementary OS 5.0 Juno (ubuntu 18.04), Blender/Sketchup/Modo/Cinema4d

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contegufo
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Re: Tips to reduce fireflies?

Post by contegufo » Wed Nov 18, 2015 4:04 am

Ciao Alvaro

Here some information about the version 4. There is no news about the release :)

http://www.indigorenderer.com/content/i ... -rendering
Mac Mini 2011 - 2,3 GHz Intel Core i5
16 GB 1333 MHz DDR3 - Intel HD Graphics 3000 512 Mb.
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OnoSendai
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Re: Tips to reduce fireflies?

Post by OnoSendai » Wed Nov 18, 2015 4:06 am

We're at a closed/private beta stage for Indigo 4. There are too many bugs to fix to make it public yet.

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contegufo
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Re: Tips to reduce fireflies?

Post by contegufo » Wed Nov 18, 2015 4:23 am

:(
Mac Mini 2011 - 2,3 GHz Intel Core i5
16 GB 1333 MHz DDR3 - Intel HD Graphics 3000 512 Mb.
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Oscar J
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Re: Tips to reduce fireflies?

Post by Oscar J » Wed Nov 18, 2015 4:40 am

There's some more info on Indigo 4 at the bottom on this page as well: http://www.indigorenderer.com/indigo3.8

About your image atm, there are two things that catch my attention: your background image seems underexposed considering how bright the sun appears to be shining. Also - about your floor - there's nothing worse than the combination too high bump value + low res bump texture. :)

Otherwise looking good already!

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afecelis
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Re: Tips to reduce fireflies?

Post by afecelis » Wed Nov 18, 2015 6:21 am

Hi guys, thanks for all the replies :D
@Contegufo: thanks for the link. I'm also very excited about Indigo 4.
@OnoSendai: thanks for taking the time to reply and letting us know about Indigo 4's current state. No hurries, the dev team must take the time required for Indigo 4 to be a software gem :D But I can't deny I'm eagerly looking forward to working with it.
@Oscar J: Thanks for the observations, all the comments you guys have made have helped me understand Indigo's workflow better. I'll make the background image brighter to make it match the interior illumination. About the bump map, is it better to simply reduce the amount/scale of the bump or instead get a higher res version of both the diffuse+bump textures?

thank you all!

cheers!
Alvaro
AMD Ryzen 7 1800 @3.6ghz, 32GB ddr4 3200 mhz Ram, 2X Nvidia Gtx 1070 8GB, Win10/Elementary OS 5.0 Juno (ubuntu 18.04), Blender/Sketchup/Modo/Cinema4d

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Oscar J
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Re: Tips to reduce fireflies?

Post by Oscar J » Wed Nov 18, 2015 6:43 am

About the last question: I'd say both. :)

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