Apple Shake 4 - Manual (Page 448)

448 Chapter 15 Image Processing Basics
In addition to storage requirements, working in float costs you render time, a minimum
of 20 percent, but usually significantly higher than that.
If you are just color timing (doing color corrections that concatenate), there is no need
to convert to float. All concatenating color correctors, including the two correctors to
convert in and out of linear representation, are calculated simultaneously. Therefore,
the following tree is still accurate.
Looking at Float Values
You can use the Float View ViewerScript to view values that are above 1 or below 0.
To look at these values, create a Ramp node, and set depth to float. Then, apply a
Color–LogLin node. When you turn on the Float View, the top 35 percent turns white,
indicating values above 1, and the lower 9 percent turns black, indicating values
below 0. Everything else turns gray, indicating values between 0 and 1.