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Vray noise is driving me insane
show user profile  lonewolfx
i'm using Vray 2 RT inside 3ds Max.

i've been modeling for a couple months but i'm new to rendering and i'm new to Vray.

i'm having major noise or grain problems with my first render.

i have read lots of tutorials and searched through tons of forum threads on noise and what settings to tweak. none of that fixed my problem! i'm going crazy!

now after tweaking various things for about a full day i managed to reduce the grain by about half but it's still totally unacceptable for my project (i will be compositing live actors shot on a dslr camera in HD).

my model is a plastic toy castle. i have tried various materials (vray materials and standard materials, etc) and they all end up the same.

here is a picture of my render after tons of tweaking...

here is a picture of my set up (just one vray sun and a vray physical camera)...

and here are some of my settings in Vray...

Adaptive DMC

Antialiasing - Off

Adaptive DMC image sampler:
min subs 1
max subs 16
clr threshold 0.005

GI on

Primary: Irradiance:
multiplier 1.0
HSph subs 40
Show calc. phase checked

Secondary: Light Cache
multiplier 0.85
Subs 700
Sample size 0.03
Show calc. phase unchecked

Environment

GI Environment (skylight) override OFF

(when I turn this on it gets dark, have to use very high multiplier to balance it out, and the grain issue is no better)

DMC Sampler
adaptive amount: 0.85
noise threshold: 0.01

Color mapping

... set for linear workflow ala this tutorialhttp://www.jamesshaw.co.nz/blog/?p=155

----

please help, i'm going crazy. and keep in mind i'm really new to all this... so if you have any tips, please explain them in a way a beginner would understand. thank you.


read 8129 times
2/10/2012 9:07:02 PM (last edit: 2/10/2012 9:07:02 PM)
show user profile  IBENEZ21
it looks like you are having an ambient occlusion, or vray dirt problem. either disable, or increase the subdivisions.
Photobucket

http://www.thunderhead3d.com

read 8121 times
2/10/2012 9:13:41 PM (last edit: 2/10/2012 9:13:41 PM)
show user profile  Bolteon
there really isn't that much grain in your render.


go to 1 | 36 @ .002 and it'll almost be completely gone.

-Marko Mandaric



read 8116 times
2/10/2012 9:19:37 PM (last edit: 2/10/2012 9:19:37 PM)
show user profile  lonewolfx
thanks for the quick reply!

ok so considering that i'm a moron... where do i disable the ambient occlusion or dirt?

and... which subdivisions do i increase?

yes i really am that stupid when it comes to rendering.
read 8115 times
2/10/2012 9:19:56 PM (last edit: 2/10/2012 9:19:56 PM)
show user profile  lonewolfx
"go to 1 | 36 @ .002 and it'll almost be completely gone."

thanks for the tips. i assume you mean in the Adaptive DMC Imape Sampler rollout.

i made the changes, re-rendered, and got virtually the same result. thanks anyway though.
read 8112 times
2/10/2012 9:26:21 PM (last edit: 2/10/2012 9:26:21 PM)
show user profile  Bolteon
then it's not render noise.


//edit

"but it's still totally unacceptable for my project (i will be compositing live actors shot on a dslr camera in HD)."


ummm... do you know what dslr footage looks like? you render noise isn't going to be an issue compared to your compression noise.



just trying to understand what your issue is here. the top image is clean enough for cg integration into a plate based off of a dslr shoot.

-Marko Mandaric



read 8106 times
2/10/2012 9:39:24 PM (last edit: 2/10/2012 9:42:13 PM)
show user profile  lonewolfx
well that back yellow wall especially seems so grainy compared to some great vray renders i've seen around the web.

i don't see that much grain or compression noise on the footage i get out of my Canon T3i, hence my concern.

maybe you're right and i'm just being too picky... it just seems much rougher than the slick renders i see.
read 8101 times
2/10/2012 9:57:38 PM (last edit: 2/10/2012 9:57:38 PM)
show user profile  Bolteon
is that sun your only lighting source?

-Marko Mandaric



read 8097 times
2/10/2012 10:01:59 PM (last edit: 2/10/2012 10:02:47 PM)
show user profile  ScotlandDave
Just a suggestion here but check scene scale and units setup ( ie you don`t have a mountain that`s 0.01 mm high )..



Website | Blog | Contact | Vimeo

read 8096 times
2/10/2012 10:02:45 PM (last edit: 2/10/2012 10:02:45 PM)
show user profile  lonewolfx
Bolteon... yes the vray sun is the only source.

ScotlandDave... i modeled it all in feet and inches to be somewhat representative of how big it would be in the real world.
read 8092 times
2/10/2012 10:04:36 PM (last edit: 2/10/2012 10:04:36 PM)
show user profile  IBENEZ21
Ambient occlusion is located in the top right corner of the indirect illumination tab. but, since you don't know where it is, you probably don't have it turned on (same with dirt).
Photobucket

http://www.thunderhead3d.com

read 8087 times
2/10/2012 10:53:07 PM (last edit: 2/10/2012 10:53:07 PM)
show user profile  lonewolfx
IBENEZ21... you're right, i checked and it's not turned on.

what could it be?

EDIT: although i've tried a couple different materials... could it be some setting in the materials?
read 8079 times
2/10/2012 11:06:04 PM (last edit: 2/10/2012 11:06:57 PM)
show user profile  9krausec
I shoot with the t3i as well, and no, the noise is not very noticeable, but it is still there... You are still going to have to add some grain to your CG objects as well as reduce the saturation..

Remember, shoot in increments of 160 iso for reduced noise (suggest Magic Lantern if you don't arleady have it installed).

Cheers




- Portfolio-




read 8072 times
2/10/2012 11:10:47 PM (last edit: 2/10/2012 11:10:47 PM)
show user profile  Joey Parker Jr.
change the noise threshold to 0.005 or even better but slower 0.002
 photo 2012-sig_small3_zpsbd114b69.png

read 8063 times
2/10/2012 11:58:55 PM (last edit: 2/10/2012 11:58:55 PM)
show user profile  killerbee2
here's a quick fix :

1. buy neatvideo
2. put neatvideo on your render in aftereffects
3. put neatvideo on your dslr footage
4. add post grain.




read 8062 times
2/10/2012 11:59:00 PM (last edit: 2/10/2012 11:59:00 PM)
 
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