9.5.2

702 • CHAPTER 13
RENDERING • RENDER SETTINGS • 703
Cylindrical Lens
So what is a cylindrical lens good for? Well, every matte painter out there will be happy to have this
additional tool with which to work.
Let’s say the modeling department sends you a rough scene from which you have to do your matte
painting. Render the scene using the cylindrical lens, then paint your scenery. You can project the
image cylindrically using camera mapping and the camera can then pan across a much larger area
than would be possible using other projection types.
Object motion blur is limited to a maximum frame size of 2,000 x 2,000 pixels and is automatically
disabled at resolutions higher than this. Also, particles cannot be blurred. Furthermore, avoid using
OMB with post-processing effects (e.g. lens ares), since this may lead to unexpected results.
These limitations notwithstanding, motion blur can create a very natural effect with its analytical
blurring. Object motion blur can create superb results with stills as well as with animation.
Scene Motion Blur
Scene motion blur will also blur shadows, reections and so on. Object motion
blur, on the other hand, does not blur these.
With a real-life camera, motion blur arises when an object ies past the camera at great speed
(‘object’ motion blur) or when the camera pans rapidly (‘scene’ motion blur). This motion blur helps
to create the illusion of real motion rather than a sequence of still pictures and so it is of great use to
animation software. Animation software does not use real shutters and real lm, so the motion blur
must be faked, see Figure 1, below.