A HDR
image is one that holds more data than a normal image. A normal image would be one
that contains intensities up to 255 RGB.While an HDR image might look the same, the
computer will understand it is higher intensity and can use it for lighting a scene.
Later in the book you??™ll see the Advanced Camera in action, and you??™ll learn how the various
settings work.
Orthographic Camera
The Orthographic Camera is a little tricky to understand. When you render a scene,
LightWave shoots out rays??”these rays are used to calculate all sorts of things, such as
Inside LightWave v9 214
Chapter 5 3D Cameras 215
shadows and reflections.You have more control over these rays in LightWave v9 than any
time before, and the Orthographic Camera is just one way to work with different rays.
With the Orthographic Camera, rather than rays bouncing all over the scene, their direction
is the same. OK, so what does that really mean? It means that you can create a camera
with a forced perspective.A forced perspective in computer graphics is more an optical
illusion than anything else. In a sense, it??™s almost the opposite effect of a fish-eye lens,
which widely distorts the image.
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