topic Re: "Yellowy" rendering tone? what do I need to ad in Visualization

"Yellowy" rendering tone? what do I need to adjust?

rob2218 — Thu, 11 May 2023 09:58:45 GMT

if you notice on the bottom rendering, the combed stucco is more "grey" where the top rendering for some reason, the tone of the combed stucco is more "yellowy".
I while back someone helped me out and said it was something to the do with the "sun" setting in the Cinemax rendering parameters.
What is it that I have to adjust so that yellow sunnish color doesn't over power the rendering?

Re: "Yellowy" rendering tone? what do I need to ad

Anonymous — Wed, 04 May 2016 03:51:43 GMT

Rob,
In Cinerender the colour of the sun changes throughout the day as does the sun in reality. You can overcome this by not using the physical sky & sun, or by adjusting the hue & gamma in post processing.
I do not know of any 3D visual artists that would use an image direct from a rendering package without touching up in a photo editing program. I am currently trying to explain this to a junior in the office who is chasing photo real straight from 3ds Max but render times have become ridiculous (4hrs to render a 1920x1080 image that I can get 85% 'there' in 15min in ARCHICAD)
Scott

Re: "Yellowy" rendering tone? what do I need to ad

rob2218 — Wed, 04 May 2016 03:55:17 GMT

So...what button do I have to adjust in order to NOT use the physical sky?

Re: "Yellowy" rendering tone? what do I need to ad

Erwin Edel — Wed, 04 May 2016 09:46:04 GMT

Rob,

Take a look at the youtube tutorials, something like this one https://www.youtube.com/watch?v=3IPjh5DdJ6w&list=PLnXY6vLUwlWVsI6mb8Txb6MYZ4wdGdvaA&index=26

Though I agree with Scott, don't spend ages perfecting the render, when you can probably do a quick levels / hue / etc adjustment in photoshop.

I generally desaturate any render by 20% as they're too vibrant to be believable.

I don't know if you are trying to get hyper realistic photo reality, but to not spend ages on renders we generally overlay a sketch render and go for a more Hergé Tin Tin look if you know what I mean by that. True photo realism just requires too much time, in my humble opinion. I could justify the billable hours for that for a billboard rendering maybe, but run of the mill presentation stuff just needs to be done fast.

Re: "Yellowy" rendering tone? what do I need to ad

rob2218 — Wed, 04 May 2016 13:58:55 GMT

thanks,
I took a look at the video, followed the instructions and I'm still getting this "yellowish" tint on the combed stucco. it's suppose to be "grey" not yellow.

Again, a while back a GS guru said to adjust something with the "sky" settings but I can recall what it was.

it was merely one button adjustment, turn it off I think but I've tried all sorts of manners of button playing and well, just can't seem to get that darn 'yellow' look off the rendering.

Really really annoying.

Re: "Yellowy" rendering tone? what do I need to ad

Anonymous — Wed, 04 May 2016 14:57:45 GMT

Hi, Rob, two things come to my mind, I don't know if you try it already.
One is the color warm in the sun and sky parameter, the ones shown in the pics.

The second one will be adjusting settings in the effects, color correction and color mapping tabs.

Re: "Yellowy" rendering tone? what do I need to ad

Anonymous — Wed, 04 May 2016 14:58:12 GMT

Here is the other Pic

Re: "Yellowy" rendering tone? what do I need to ad

rob2218 — Wed, 04 May 2016 15:19:04 GMT

thanks Rivas.....I adjusted the "warmth color" of the sun and that helped.
Holy Cow...such complications just to get a "color" of material to look semi-right.

I got this client who's a stickler for 'color' and how it looks.
I tried explaining it to him that as soon as you get into "material" and "color" of the design, all bets are off. What he is always looking for is "the correct color and material"..wahtever that means representation.
and to top it off...I'm freakin' color-blind so getting to the "right" color is like going to dentist for me...virtually impossible at times...
it seems that clients just can't get past the "just look at the concept/design of the study" we are talking bout here....sheesh...

thanks a heep, that helped.

Re: "Yellowy" rendering tone? what do I need to ad

Anonymous — Wed, 04 May 2016 15:23:30 GMT

Great!

I understand u, I have also deal with that type of clients

Re: "Yellowy" rendering tone? what do I need to ad

rob2218 — Wed, 04 May 2016 15:27:56 GMT

it really is ridiculous at times how these clients get hung-up on what they are looking at.....and can't get past colors and materials.....JUST LOOK AT THE CONCEPT!...damn it and the colors and materials will be refined once the 'idea' gets approved.......SHEESH!!!

Re: "Yellowy" rendering tone? what do I need to ad

Karl Ottenstein — Wed, 04 May 2016 15:29:39 GMT

rob2218 wrote:
I got this client who's a stickler for 'color' and how it looks.

You'll need to tell your client to chill out, as there is no accurate color other than in a laboratory setting. All is perception and affected by the ambient lighting, whether artificial or natural. For outdoors, the perceived color of any object changes at every hour of every day and with the weather and surrounding environment.

Just point the client to the image-gone-wild from a year or two ago of the woman in the gold and blue - or was it white and black - dress that took over the internet and talk shows. Our eyes need context to determine (guess) what is true white or black and calibrate from there.

Our eyes are also easily tricked. If you have a USA flag, for example, that the viewer expects to be pure red, white and blue but actually color it slightly differently - it will affect the viewer's perception of all other colors in the image.

Explain to the client that there is a reason that paint stores such as Sherwin Williams have 'light boxes' for you to put color chips in and view them under different lighting conditions - where the color chip looks different in every light box. No one light is 'correct' - just approximating the customer's anticipated environment.

Good luck. Clients who want things like this are probably impossible to please.

Re: "Yellowy" rendering tone? what do I need to ad

rob2218 — Wed, 04 May 2016 15:33:45 GMT

Karl wrote:
rob2218 wrote:
.......

Good luck. Clients who want things like this are probably impossible to please.

You nailed it sir.
thats an understatement for this guy.
he fusses over such little things that don't allow the production to more forward. I'm talkin' stuff like, moving a outlet centered with a door key hole or something as ridiculous as that....it's very odd the things folks tend to obsess over at times. God forbid you point that out to them and the all of sudden freak out.....and feel threatened of sorts....very odd.

Re: "Yellowy" rendering tone? what do I need to ad

vistasp — Thu, 05 May 2016 04:41:38 GMT

Sigh. We all have clients like these sometime or the other. Doesn't usually end well, in my experience.

Thank goodness for the white model option in CineRender. I've started showing those at the initial stage and it's made a huge difference. For a change they actually look at the form instead of starting a pointless, detailed, discussion on the materials we're eventually going to use!

Re: "Yellowy" rendering tone? what do I need to ad

Erwin Edel — Tue, 10 May 2016 11:39:31 GMT

A bit off-topic, but a tip in general, once you tweaked things to work: save the settings as a scene, you can import that for a next project and perhaps most importantly, different views ask for different settings, so you might lose your hard found tweaked parameters for another render in the same project.

Oh, and maybe check your sun settings from Perspective > More Sun. I've got all of the colours set to white there, to make sure there is nothing else affecting colours.