Search found 2 matches

by resuna
Fri Jul 30, 2004 11:15 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Orientation of planetary surfaces...
Replies: 3
Views: 34735

Synthetic images are different.

That's one of those synthetic images where the surface imagery is layered on a topographic map and rendered in a perspective view. They've got a lighting model that's forced on them by the CGI software they're using, and those tend to be relentlessly conventional. I'm talking about the real images f...
by resuna
Thu Jul 29, 2004 1:23 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Orientation of planetary surfaces...
Replies: 3
Views: 34735

Orientation of planetary surfaces...

Is there something about astronomers and geologists (planetologists?) that makes them expect to see light coming up from beneath when they view a picture? Almost every picture I see of Mars or any other planertary body from orbit seems to be oriented so the illumination is from below, so the craters...