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Renders turn out YELLOWY and Blurry anyone know why?
Posted: Mon Mar 16, 2009 8:45 pm
by nappy
yeah i like the maxwell lighting too but had to make it more "blue" because the print outs were turning out very yellow.
But anyway, the render is blurry/grainy..do you think by just upping the render resolution (to like 6000x8000 for example) would solve the problem?
thanks bub
Posted: Mon Mar 16, 2009 10:08 pm
by frosty_ramen
nappy
are you using the physical sun? that will add a yellowish tint to your renders. also your sl level question about noise is something that can be found here.
http://www.maxwellrender.com/forum/view ... e+optimize
hope this helps
dan
frosty ramen
Posted: Tue Mar 17, 2009 5:24 pm
by nappy
Thanks frosty!
I am using physical sun..is there any benefit to turning it off?
With physical sun turned on..aren't the renders more "realistic" with better shadow qualities?
thx
Posted: Tue Mar 17, 2009 11:07 pm
by jfrancis
Sometimes when things turn out blurry for me it's because I forgot to get the focus distance correct and I'm actually seeing blur for 'correct' reasons.
Posted: Wed Mar 18, 2009 2:26 am
by Bubbaloo
Blurriness is due to depth of field. Read up on photography concepts and it will help you tremendously (I know it helped me).
The "yellowness" just depends on the lighting and scene. It would help to show a rendering. Did you change the temp of the sun?
Here is the IMAGE FILE
Posted: Wed Mar 18, 2009 4:06 pm
by nappy
Lots of post render work in photoshop.
The original render was sort of grainy/fuzzy
I will render at higher resolution last time..this one was rendered at just 1920 x 1280 (or less).
image is not big enough as shown but once u blow it up it is kind of pixelated/grainy because i used quite a bit of sharpening.

Posted: Wed Mar 18, 2009 4:11 pm
by Bubbaloo
Not bad. Can you show what it looked like straight from Maxwell? That's really the only way to see what's wrong (if anything) in your scene.
ok!
Posted: Wed Mar 18, 2009 4:13 pm
by nappy
ok sure thing! let me try to find the file
thx bub
here's the original render
Posted: Wed Mar 18, 2009 4:17 pm
by nappy
Rendered straight from maxwell to 17.5 SL on dual quad core xeon
Boxx. Unedited.
You can see the graininess, bluriness and the desaturated look. Details not as sharp as i expected.
For exterior lighting, used physical sky/sunlight with an HDRI (but at like intensity level 1 so hardly noticeable)
Rendered at 1920 x 1280 or something smaller.

Posted: Wed Mar 18, 2009 4:43 pm
by Bubbaloo
Hmmm... I like the lighting / colors straight from Maxwell better... That's just me though. Maybe someone else can chime in with their opinions.
hmm
Posted: Wed Mar 18, 2009 4:48 pm
by nappy
Would upping the render resolution solve:
a) graininess
b) desaturated look
c) bluriness
Thanks!
I had to tone down the yellow from the original the render because the print outs were turning out way too yellow
Posted: Wed Mar 18, 2009 4:57 pm
by Bubbaloo
Graininess: I think so. I always render my finals to the highest res my computer can handle. It seems to clear faster and look better when its finished and printed. One thing to say is, don't expect to reach such a high level like 17 though, the levels move slower, but it clears up nicer at lower levels.
Desaturated look: No. Photoshop levels and curves, that's the easiest way to get your colors brighter... for now.
Blurriness: Yes. It will solve it, but also consider your fstop setting. For daylight renders I usually start with f16 iso 100 shutter 1/125, then adjust from there.
Posted: Wed Mar 18, 2009 8:34 pm
by lebbeus
double-check that your materials are set-up correctly, i.e. no plastics with both layers set to 100% and colors within accepted ranges (nothing above 240---or has this been "fixed??"

)
I never thought it really made a difference, but it does and the scene will clear up faster and the lighting will look better
Posted: Wed Mar 18, 2009 9:33 pm
by Tea_Bag
lebbeus wrote:double-check that your materials are set-up correctly, i.e. no plastics with both layers set to 100% and colors within accepted ranges (
nothing above 240---or has this been "fixed??" 
)
There was no problem that needed fixing it was just a general rule that was suggested for improvement on noise

hello
Posted: Wed Mar 18, 2009 9:39 pm
by nappy
hey teabag and lebbeus,
Nothing is above 240..I think all are 232 or under.