Take your compositing techniques to the next level! Better keying, auto collision detection, event triggers, and many more! This one is a must see!
When I first started working with After Effects, I came across a difficult problem in which I didn’t want to solve it by animating keyframes by hand. As usual, I applied expressions to the problem, but at the time, expressions didn’t really solve it the way I wanted either. Now, with the release of After Effects CS3, my vision has come to life. I have created the CustomEffects that utilize the new sampleImage expression. These CustomEffects have made my job easier and I hope that they’ll help you as well.
This tutorial will show you how you can simplify the keying process, trigger expression events to control layers of your choice, and even do an automatic collision detection. Possibilities are endless.
sampleImage expression seems to be unstable in some cases, and since PixelSampler is based on that expression I strongly recommend saving your work before doing a RAM Preview.
Below you can download probably the most powerful preset package ever released. This package includes:
- PixelSampler (grab a color from a pixel or a range of pixels)
- ColorSampler (compare two colors and see if they match)
- ColorHSL (calculates hue, saturation, and lightness for use with expressions)
- MatchingValues (compare any two values and see if they match)
This tutorial focuses on PixelSampler, but other CustomEffects are also mentioned. They are build so that people who don’t like expressions could still take advantage of them. Take ColorHSL for example. This converts RGB values to HSL. This can be easily done by using expressions, but using this CustomEffects simplifies the process by allowing to use the pickwip tool and point to one of the HSL values.
If you don’t know how to handle my CustomEffects make sure to wait till the end of the tutorial and to read this short article.