Join Lee Lanier for an in-depth discussion in this video Applying color effects, part of Learning Fusion 7.
- I'm going to spend some time talking about color infusion. Altering the colors through the color channels is an important task of compositing. And compositors like Fusion, of course, work with RGB, red, green, blue channels. You can see those if you change the color menu right here in the view. For example, here's a red channel. Each channel represents the intensity of pixels for that particular color. Where the pixels are bright, that means there's more of that color, like red, where they're dark, there's less of that color. There are a number of tools you can use inside Fusion to alter the color channels.
And this is very useful for color grading. You might need to color grade for one of several reasons. You might need to adjust colors to better match elements. For example, to better match a CG render to a live action background. You might also make color adjustments for aesthetic reasons. You might want to make a shot look warmer, like it's at sunset. Let's give a couple of the color tools a try here. I'm going to switch my menu here back to color for RGB, and here's the image sequence that needs some color adjustment. Right now, this actress is dimly lit, and she's very greenish-yellow.
This is the DarkCU image sequence included in the 06_colors directory. So, with this loader selected, let's grab a color tool. I'm going to start with a couple simple ones. Under Tools, Color, Brightness/Contrast. We'll use that one first. I'll make sure to look at the output of this by pressing the 2 key, so it appears in the view. So, Brightness/Contrast carries many of the common color properties. And many of these you'll see in other programs like After Effects, or even Photoshop. The Gain slider will brighten everything, while maintaining the contrast, if you raise it.
So the shadows stay fairly dark. If I lower it, everything just becomes darker and less contrasty. The default value is one. If you raise Lift, everything becomes brighter, however, there's no contrast; it becomes very washed out. Gamma row sends that power function that's often used to adjust for human vision, where humans can see differences in dark colors better than they can differences in bright colors.
If I raise Gamma, everything becomes brighter, maintains some of the contrast. If I lower it, everything becomes darker. Contrast does what it sounds like it should do, increases the contrast if I raise it, or reduces it the opposite direction. If I raise the contrast, see brights get brighter, and the darks get darker, and there's fewer mid-tone values. Brightness will push everything to the high end, or down to the dark end.
Saturation increases the contrast between channels. If I raise the saturation with this footage, I can see the reds of the skin tone, and the yellow-green of the highlights, however, I see very little blue. If I reduce saturation, it becomes more and more desaturated to the point where all channels are equal, and you get grayscale. If you have equal amounts of red, green, and blue, you whites, gray, or black. It's also an interactive range tool, right below Saturation, where it says Low and High. If you grab one of these brackets and move it, you're using a smaller portion of the entire color range.
Let's say I pull the right one towards the left, it means that I'm using just the lower ranged values. And those are actually expanded into the entire 0 to 1 area. And 0 to 1 represents color range of this particular color space that I'm working in. Because that range is expanded, it appears as if everything got brighter. If I do the opposite, if I pull the left bracket towards the right, I'm simply maintaining the highlights and throwing everything else away. Only pixels with values above .38 or so are saved, so, therefore, we only can see the highlights.
So this offers an interactive means to pick a smaller color range. So, Brightness/Contrast has some very common controls for color manipulation. Let's try one more tool. We'll go ahead and delete this, with it selected, press the delete key, get rid of that. With the Loader selected, I'll go back to Tools, Color, and we'll grab Color Corrector. Press the 2 key so I can see the results of that. Now we have used this tool in a past video.
And, in fact, this carries many of the controls we just saw with Brightness/Contrast, and these function in the same manner. However, one advantage of this tool is the interactive color wheel, where you can adjust the overall tint or overall color cast. Just grab the little circle in the center, and pull that handle. If you pull the handle towards the edge of the circle, you get a more intense saturation of that particular color that you're pointed towards. And it's like you're tinting the image. If you keep the handle closer to the center, the colors are shifted toward that particular color, but not so intensely.
As I move the handle, I see the tint is changing, and that represents a particular position on the color wheel. This strengthens essentially the intensity of that tint. It's going to make slight changes, for example, maybe make it a little bit more orangey-red, or intense changes, where it becomes very, very saturated and tinted. So, while there are many color tools in Fusion you can use to adjust the color, some of the tools will share similar properties. It doesn't matter which tool you use, as long as it gives you the result you'd like. In this case, with this footage, I really should make it brighter.
So, Gain will work well in this situation. And then, also, instead of having it more yellow-green, it does look better a little bit more orangey-red. So there we go. There was some color grading on this footage.
- Basics of the Fusion interface and general workflow
- Creating tool (aka node) networks
- Working with transforms
- Using expressions
- Masking and rotoscoping
- Altering outputs with color correction and effects
- Compositing in 3D
- Motion tracking
- Keying with Primatte
- Rendering to disc