Trying to get rid of fairflies, need advice.

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zooropa
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Re: Trying to get rid of fairflies, need advice.

Post by zooropa » Wed Oct 07, 2020 10:33 am

Sharlybg wrote:
Wed Oct 07, 2020 10:26 am
What is your clamping value ?
Hi Dravia! you mean this?
dravia.jpg
Its unchecked....

zooropa
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Re: Trying to get rid of fairflies, need advice.

Post by zooropa » Wed Oct 07, 2020 10:40 am

ok I needed to turn it off...its 55 minutes...and 1000px it does not make much sense...I hope I am doing wrong I really hope so hahah

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Dez!
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Re: Trying to get rid of fairflies, need advice.

Post by Dez! » Wed Oct 07, 2020 11:13 am

there it is necessary to set the maximum brightness value for any pixel in the image.
try it, put 1, and it will get a little dark, but the fireflies will disappear.
then, gradually increase the value until the fireflies reappear.
well, or give me a scene, I have 15 minutes of time, I'll see.
Linux Plasma | Ryzen 5, 32Gb, SSD M2, GT 590 RX | BenQ 27 | Wacom One | Microsoft Ergo | Tie Guan Yin tea
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Dez!
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Re: Trying to get rid of fairflies, need advice.

Post by Dez! » Wed Oct 07, 2020 11:16 am

and no need to wait 55 minutes!
select ctrl + B the most problematic area, small, and do quick renderings only of it. Conveniently, you can switch slots in the view of ready renders
Image
Hotkeys J and Alt + J
Linux Plasma | Ryzen 5, 32Gb, SSD M2, GT 590 RX | BenQ 27 | Wacom One | Microsoft Ergo | Tie Guan Yin tea
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Sharlybg
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Re: Trying to get rid of fairflies, need advice.

Post by Sharlybg » Wed Oct 07, 2020 11:55 am

Please make sure to read some basic luxcore tutorial it will avoid you a lot of useless headaches and save you somuch time and energy ;) :

https://youtu.be/UVattTf1a5Q
Support LuxCoreRender project with salts and bounties

Portfolio : https://www.behance.net/DRAVIA

zooropa
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Re: Trying to get rid of fairflies, need advice.

Post by zooropa » Wed Oct 07, 2020 12:39 pm

Sharlybg wrote:
Wed Oct 07, 2020 11:55 am
Please make sure to read some basic luxcore tutorial it will avoid you a lot of useless headaches and save you somuch time and energy ;) :

https://youtu.be/UVattTf1a5Q
Thank you ! I do know the video. It is hard to remember where and when to go to check it. Also the explanation about the feature is not really clear. I just repeated what you did and put the clamp value on 50. It could be nice to understand why and what I am doing that.

Thank you for your invaluable resources! It would help if we had a more in depth manual.

zooropa
Posts: 65
Joined: Sat Mar 28, 2020 10:36 am

Re: Trying to get rid of fairflies, need advice.

Post by zooropa » Wed Oct 07, 2020 12:41 pm

Dez! wrote:
Wed Oct 07, 2020 11:13 am
there it is necessary to set the maximum brightness value for any pixel in the image.
try it, put 1, and it will get a little dark, but the fireflies will disappear.
then, gradually increase the value until the fireflies reappear.
well, or give me a scene, I have 15 minutes of time, I'll see.
Thank you for your help! I will try and if I do not succeed I would like to send it to you.

I am now using the clamp feature as suggested by the other user and wrote 50 in the value. Following the video he did he seems to use that value for the caustics. Do I still need to use the denoiser feature you suggested in 10 (the advance feature).

zooropa
Posts: 65
Joined: Sat Mar 28, 2020 10:36 am

Re: Trying to get rid of fairflies, need advice.

Post by zooropa » Wed Oct 07, 2020 1:06 pm

Dez! wrote:
Wed Oct 07, 2020 11:13 am
there it is necessary to set the maximum brightness value for any pixel in the image.
try it, put 1, and it will get a little dark, but the fireflies will disappear.
then, gradually increase the value until the fireflies reappear.
well, or give me a scene, I have 15 minutes of time, I'll see.
Using a value of 50 Max bright in clamp features...still gives me an endless render. Do you think it might be the settings in the denoiser ?
denoiser.jpg
denoiser.jpg (15.21 KiB) Viewed 408 times

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Dez!
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Re: Trying to get rid of fairflies, need advice.

Post by Dez! » Wed Oct 07, 2020 1:27 pm

Set the Clamp value to 1 first.
Make a test render of a small section of the image.
Then set the value to 2-4. Check again.
You need such a value when there will be no fireflies, but the scene will not lose in lighting.
Most likely, a value in the region of 5-8 will suit you.
Image

Yes, the lower this value, the longer it takes to render.
Image

Values below 20 are used for completely flawless, perfect results.
The fireflies should also disappear at 75 if the Clamp is set correctly.
Linux Plasma | Ryzen 5, 32Gb, SSD M2, GT 590 RX | BenQ 27 | Wacom One | Microsoft Ergo | Tie Guan Yin tea
http://dezigner.tilda.ws/

zooropa
Posts: 65
Joined: Sat Mar 28, 2020 10:36 am

Re: Trying to get rid of fairflies, need advice.

Post by zooropa » Wed Oct 07, 2020 1:42 pm

Indeed the clamping feature at mac brightness 5 give me a almost free fireflies...at 5500 samples...
I guess...then a render of 1000 x 1000 will take 4 hours.

ok I exaggerated driven by my frustration: It will be around 1 hr for 1000px

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