Tony Vigil wrote:
> 
> Is there a way to modify the vertical camera angle?

Normally POV-Ray pans left or right by rotating about the y-axis until it
lines up with the look_at point and then tilts straight up or down until
the point is met exactly. However you may want to slant the camera sideways
like an airplane making a banked turn. You may change the tilt of the camera
using the sky vector. For example:

 camera {
  location <3,5,-10>
  sky   <1,1,0>
  look_at <0,2,1>
 }

  This tells POV-Ray to roll the camera until the top of the camera is in
line with the sky vector. Imagine that the sky vector is an antenna pointing
out of the top of the camera. Then it uses the sky vector as the axis of
rotation left or right and then to tilt up or down in line with the sky
until pointing at the look_at point. In effect you're telling POV-Ray to
assume that the sky isn't straight up. Note that the sky vector must appear
before the look_at vector.

The sky vector does nothing on its own. It only modifies the way the look_at
vector turns the camera. The default value is sky<0,1,0>.


-- 
Ken Tyler

mailto://tylereng@pacbell.net

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