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The next set of controls for our cinematic post-processing chain will be related to tweaking the color.

the first one is going to be temperature, a major part of calibrating the white balance.

based on the temperature slider, the overall color of lighting can be made warmer or cooler, so let's

start with adding the mix node, choosing multiply as the blend mode and there we simply

balance the overall temperature of lighting by moving it over to the orange or the blue parts

of the color wheel. the mix factor can also be used to fine tune the grading, the change to the color

temperature is a sweeping change to all the color relationships in your lighting, it's this type

of much needed extra control over your lighting scheme that just changes the overall relationship

between colors in your lighting and allows you to push it towards warmer or cooler tones.

aside from the temperature control, the photographic post-processing tools often include

the tint control as well, the tint slider usually goes from green to magenta to cover that portion

of the color gamut, so the mix node is invited to stage once again. if you know me I like to rename

the nodes and everything to keep things organized, so that one should be named tint from now on :)

as we have mentioned you either choose green or complementary color to green

which is magenta and the rest of the game is just eyeballing the intensity of the tinting effect,

so the combo of temperature and tint nodes is our way of controlling white balance in Blender

compositor and think of it as a rather global adjustment, as opposed to tweaking the individual

lights and trying to balance them against each other, tweaking these two nodes alone may alter

the perception of the entire lighting that we have set up. as they say, borrow from cinematographers :)

the value contrast or the contrast of brightnesses plays an important role in

color grading. there are a few places in Blender where you can adjust the contrast: in the Blender

compositor we have the brightness-contrast node but I prefer the other methods as I think that

by using this node in the compositor it's fairly easy to clip the blacks for example, so I don't

feel really comfortable with it for some reason. the RGB curves node is much better in that sense,

a common way to ramp up the value contrast there is to draw the so-called s-shaped curve

and then you can play with the position of these points to pivot the contrast.

again, M mutes and unmutes the node and can be used to compare before and after.

so that is yet another way of controlling the contrast. we also have the color

management tab where such things can be controlled so let's have a look at it.