- [Voiceover] To achieve a desired effect
using the photometric spectral model in view,
you'll have to do a lot of experimentation.
And I've invested a fair amount of time
in figuring out what are the optimal atmospheric settings
for the look that I want to achieve
which is going to transition from a pretty gloomy cloudy
to slightly more sunlit view
within the duration of the short animation.
So, we're gonna start from gloomy and cloudy,
open up the Atmosphere Editor.
And we've already adjusted our sun parameters.
Now let's go into the light tab,
and we're going to leave the lighting model
at its default of global radiocity
with indirect skylighting and optimized for outdoor enabled.
Down at the bottom, we do want to apply our settings
to the sky and clouds, so enable that switch,
and most importantly, at the very bottom,
allow overriding photometric settings,
turn that on,
and then most of these controls are available.
I want to make some adjustments to the amount of light.
The balance of light between sun and sky
and the source of the ambient light.
So the light intensity I'm gonna bring down
just a little bit to -0.1.
Light balance I want most of the light
to be coming from the sky, and the sun as if it were
behind a cloud.
We don't have any clouds in this shot yet,
but we're going to simulate the effect
of the sun coming from behind a cloud
by animating this light balance later.
For now I'm gonna give it a low value of 8,
and then the ambient light
I want to mostly be coming from the clouds and sky
and not just a uniform color.
I'll bring that up to 90%.
The ambient light color is set to a default light blue.
I'm gonna change that to white,
click on the ambient color swatch,
and increase the brightness up to its maximum,
so we have a luminance of 255 and click OK.
We set up all of the light parameters
and let's give a-go at rendering this,
see what it looks like, click OK.
And, once again, in the main camera view,
click on Quick Render.
Once the render is complete, we can compare it to others
by going back into the render stack.
And here it is after adjusting the balance
between the sun and ambient light.
And here it is before making that adjustment.
So that's the sun behind a cloud, and that's the sun
in full daylight.
Alright, let's go back into our atmosphere editor.
Close the render display.
Click on the atmosphere editor button on the control bar,
or use the keyboard shortcut which is F4.
Go to the Sky, Fog, & Haze tab.
And we're going to increase the amount of haze.
Gonna crank that up quite a bit,
in fact, to 200%.
And the mean altitude to 200 meters.
The default haze color is neutral gray.
I want to tint that towards blue.
Click on the haze color swatch, and enter in the values
of hue of 151, a luminance of 87, and saturation of 62.
And we've got a blue color here.
And then finally down here we have aerial perspective.
And this is the amount of blueness in the distance.
We want to increase that a bit.
A natural value would be 1.
We're gonna use a value of 0.5, and click OK.
And do another test render once again.
After adjusting the Sky, Fog, & Haze tab controls,
our look has changed dramatically.
Click on browse previous render in the render display stack.
Here is a version after we adjusted the sky, fog, and haze.
And here's a version before.
Of course the final look of our rendering
is determined by many factors, including the cloud layers
and exposure settings.
But right now we have a pretty good approximation
of the look we're going for,
which is a dark and gloomy day.