Erin
Posts: 1
Joined: Wed 27 Mar 2019 01:16

Grain / Noise on surfaces in renders

Tue 2 Apr 2019 04:54

Hi all,

I'm having issues with grainy / noisey surfaces and shaders in Artlantis 6.5 and beyond. This happens in these below scenarios:

1. When REFLECTION colour of a shader is anything lighter than pure black (RGB 0-0-0)
2. When the SHININESS level of a shader is anything other than 0 or 1000 when using a REFLECTION colour that isn't black (eg RGB 20-20-20).
3. Neon light shader (or light plane shader) is used.

I have attached the below items with the settings used to create each scene as examples of this.

Render Test A:
- Rendering Parameters shown
- Neon light shader to rear of circular unit shining onto wall (eg halo effect) and recessed light strip under shelves (both set to 1000-1500 lm)
- Black chairs - REFLECTION colour RGB 20-20-20, shininess 10
Note: Grainy texture on wall, ceiling, counters, bottles and black salon chairs

Render Test B:
- Rendering Parameters shown
- No neon light shaders used at all
- Black chairs - REFLECTION colour RGB 20-20-20, shininess 10 (as per Render Test A)
Note: No grainy texture except for black salon chairs

Render Test C:
- Rendering Parameters shown
- Neon light shader to rear of circular unit shining onto wall (eg halo effect) and recessed light strip under shelves (both set to approx 15000 lm)
- Black chairs - REFLECTION colour RGB 20-20-20, shininess 10
Note: Slightly less grainy texture to that of Render Test A.


I have found similar posts from other users regarding similar issues, however, their resolutions have not fixed the problems. Anyone who could help with this?

Thank you!
Attachments
TEST A+B_SETTINGS.png
TEST A+B_SETTINGS.png (121.51 KiB) Viewed 683 times
RENDER TEST_A.jpg
RENDER TEST_A.jpg (245.94 KiB) Viewed 683 times
RENDER TEST_B.jpg
RENDER TEST_B.jpg (173.04 KiB) Viewed 683 times
TEST C_SETTINGS.png
TEST C_SETTINGS.png (122.23 KiB) Viewed 683 times
RENDERTEST_C.jpg
RENDERTEST_C.jpg (203.28 KiB) Viewed 683 times

User avatar
CamilleSarrut
Posts: 593
Joined: Tue 20 Oct 2015 08:41

Re: Grain / Noise on surfaces in renders

Tue 2 Apr 2019 09:07

Hello,

You made those tests with version 6.5, 7 and 2019 ?
You have the same results in each version ?

For the grain on the chair I would suggest a shininess of 750. 10 is too small and will create grain and in a longer time !

For the grain coming from the neon shader, you should keep a lighting value to 1500-2000lm and increase the light sampling to 5.
If you are using version 2019 you can increase light sampling to 6, it will take a little longer but there should be nearly no grain.

To have more infos on how to set rendering parameters you coud also read this article: https://artlantis.com/2017/10/30/speed- ... antis-6-5/

Best regards,
Camille Sarrut
Abvent R&D

pureform
Posts: 1
Joined: Sun 7 Apr 2019 15:06

Re: Grain / Noise on surfaces in renders

Sun 7 Apr 2019 15:15

I hate this new neon shader. It's very problematic. In 6,5 was amazing effect. Now I hate this shader. What happen? Fix this.

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