Camera Tracking - Nuke 101: Professional Compositing and Visual Effects - page 415

If you don't have a NukeX license, please read on anyway as only a small part of this
chapter covers steps you won't be able to perform.
Calculating Reflection Movement Using Camera Tracking
In Chapter 5 's four-point tracking exercise, you composited a new picture into a frame
and left it with no reflection on the glass. As promised, you will now add the reflection.
To calculate the correct way the reflection will move on the glass, you need to use a re-
flective surface at the location of the frame and have it reflect something—preferably the
other wall of that room. You also need to shoot that surface in the same way the original
shot was shot. For that you need to extract the camera information for the shot.
Since you'll be tracking with the CameraTracker node you need to launch NukeX rather
thanstandardNuke.Ifyoudon'thaveaNukeXlicense,finishthissectionwithyourstand-
ard version of Nuke and then continue on with the steps from the “ Loading a pre-gener-
ated CameraTracker node ” section, and only do the steps in the “ 3D Tracking in Nuke ”
section you can do, which doesn't include the actual tracking process.
1. Launch NukeX. If you don't own NukeX, launch standard Nuke.
Note
Many employers have NukeX—and they may expect you to have a
full understanding of the CameraTracker node—so you will want to
read and learn the information in the “ 3D Tracking in Nuke ” section
even if you only have standard Nuke.
2. Open a Nuke script by pressing Ctrl/Cmd-O. Go to your student_files folder and
double-click frame_v01.nk ( FIGURE 10.2 ) .
Figure 10.2. This is the script as you left it.