http://wiki.povray.org/content/Reference:Camera#Focal_Blur

The docs say, "The center of the zone of sharpness is specified by the 
focal_point vector. The zone of sharpness is a plane through the 
focal_point and is parallel to the camera. Objects close to this plane 
of focus are in focus and those farther from that plane are more 
blurred. The default value is focal_point<0,0,0>."

How can a plane be parallel to the camera? Can't a plane only be 
perpendicular to a vector?

Also, I don't understand why a plane is used at all. All points 
equidistant from focal_point should form a sphere, don't they?

Mike

Post a reply to this message