Nenius
Posts: 16
Joined: Tue 7 Feb 2017 23:26
Contact: Website

Noisy background

Wed 2 Aug 2017 17:32

Hello you all
I´m having problems with the grass shader. I share my setting and the example. I don´t know how to fix it. Anyone can help please?
I don´t like the grass, is too noisy. I tested with many different grasses, always the same.
Thanks!!!
Attachments
Captura de pantalla 2017-08-02 a la(s) 14.29.10.png
settings
Captura de pantalla 2017-08-02 a la(s) 14.29.10.png (1.29 MiB) Viewed 5961 times
otro.jpg
render
otro.jpg (172 KiB) Viewed 5961 times
Thanks in advance!!

User avatar
CamilleSarrut
Posts: 688
Joined: Tue 20 Oct 2015 08:41

Re: Noisy background

Fri 22 Sep 2017 11:00

Hello,
Did you try increasing the size of the grass shader ?
Camille Sarrut
Abvent R&D

Nenius
Posts: 16
Joined: Tue 7 Feb 2017 23:26
Contact: Website

Re: Noisy background

Fri 22 Sep 2017 13:33

Hello Camille
I´ve also tried increseasing 2 and 4 times the size. But I don´t see a substantial difference.
What do you think?
Attachments
Pasto10Adentro.jpg
4 times the size
Pasto10Adentro.jpg (83.9 KiB) Viewed 5847 times
Pasto 10.jpg
4 times the size
Pasto 10.jpg (160.88 KiB) Viewed 5847 times
Pasto 5afuera.jpg
2 times the size
Pasto 5afuera.jpg (75.03 KiB) Viewed 5847 times
pasto 5.jpg
2 times the size
pasto 5.jpg (57.84 KiB) Viewed 5847 times
Thanks in advance!!

User avatar
CamilleSarrut
Posts: 688
Joined: Tue 20 Oct 2015 08:41

Re: Noisy background

Fri 22 Sep 2017 17:27

Hello again,

Are you using HDRI lighting ?
Because that might cause the problem.
If you use HDRI, you need to use Exposure 1, check Enhanced background, set light sampling to 5 and check Automatic white balance.
Hopefully this should help removing the noisy effect on the grass shader 8-)

This is what I've done for this image:
HDRI_light_sampling-5_enhancedBG.jpg
HDRI_light_sampling-5_enhancedBG.jpg (132.69 KiB) Viewed 5844 times

Settings:
HDRI_settings.png
HDRI_settings.png (72.44 KiB) Viewed 5844 times
Camille Sarrut
Abvent R&D

Nenius
Posts: 16
Joined: Tue 7 Feb 2017 23:26
Contact: Website

Re: Noisy background

Sun 24 Sep 2017 23:16

Hello Camille
It´s not better. I tried the same settings as you recommended me, and similar setting without HDR.
Attachments
Captura de pantalla 2017-09-24 a la(s) 20.13.12.png
as you recommended
Captura de pantalla 2017-09-24 a la(s) 20.13.12.png (1.24 MiB) Viewed 5835 times
Captura de pantalla 2017-09-24 a la(s) 20.12.52.png
similar, but no exposition
Captura de pantalla 2017-09-24 a la(s) 20.12.52.png (1.37 MiB) Viewed 5835 times
Oeste con HDR.jpg
similar, but no exposition
Oeste con HDR.jpg (221.81 KiB) Viewed 5835 times
Thanks in advance!!

Nenius
Posts: 16
Joined: Tue 7 Feb 2017 23:26
Contact: Website

Re: Noisy background

Sun 24 Sep 2017 23:17

this image was missing, is the one your recommended me
Attachments
Oeste con HDR segunCamille.jpg
Oeste con HDR segunCamille.jpg (464.44 KiB) Viewed 5832 times
Thanks in advance!!

User avatar
CamilleSarrut
Posts: 688
Joined: Tue 20 Oct 2015 08:41

Re: Noisy background

Tue 26 Sep 2017 09:00

Hello,

With the recommended setting the grass is a little less noisy. I'm not sure we can make it better... sorry
I can ask Stephane Desmulie when he comes back from vacation next week.

But the image is too bright, maybe change the lighting power of your HDR.

Best regards,
Camille Sarrut
Abvent R&D

Nenius
Posts: 16
Joined: Tue 7 Feb 2017 23:26
Contact: Website

Re: Noisy background

Tue 26 Sep 2017 11:39

Ok, perhaps she has any idea. Please, let me know. Thanks and
Regards
Thanks in advance!!

User avatar
CamilleSarrut
Posts: 688
Joined: Tue 20 Oct 2015 08:41

Re: Noisy background

Tue 10 Oct 2017 08:55

Hello,

Stephane told be the noise might come from the bump value of the grass shader. Have you added some bump on the grass shader ?

Best regards,
Camille Sarrut
Abvent R&D

Nenius
Posts: 16
Joined: Tue 7 Feb 2017 23:26
Contact: Website

Re: Noisy background

Thu 12 Oct 2017 14:04

Hello.
There´s no bump added. But It seems the images looks better, what do you think? I attach them with the Camille advice settings, and another with similar settings
Attachments
Settings 3.jpg
Settings 3.jpg (760.23 KiB) Viewed 5721 times
Settings 3 s_Camille.jpg
Settings 3 s_Camille.jpg (190.73 KiB) Viewed 5721 times
Settings 2.jpg
Settings 2.jpg (836.45 KiB) Viewed 5721 times
Settings 2 s_CamilleExposure1.jpg
Settings 2 s_CamilleExposure1.jpg (205.68 KiB) Viewed 5721 times
Settings 1.jpg
Settings 1.jpg (600.03 KiB) Viewed 5721 times
Setting 1_Suite.jpg
Setting 1_Suite.jpg (148.21 KiB) Viewed 5721 times
Thanks in advance!!

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