Image features such as thin lines and sharp edges may shimmer or crawl
when you rotate a QTVR image created by The Panorama Factory.
The QuickTime viewer has two ways to generate images, the slower,
high-quality method and the faster, lower-quality method. The Panorama
Factory uses the lower-quality method to display the image while it is
moving and then uses the high-quality method when you release the mouse
The moving image shimmers because the faster, lower-quality method is
not filtered to eliminate image aliasing artifacts. The slower,
high-quality method applies an anti-aliasing filter, so the image
artifacts disappear when the motion stops.
The Panorama Factory has been this way since its QTVR support was first
implemented in 2001. The reason is that computers were not fast enough to
use the slower, good method while the image was moving. It made the motion
of the image jerky.