Yes, could be variable depending on the scene alright. One major factor
is shadows, remember, they are heavy on the render time. A scene like
this and you have little shadow areas similar to smaller objects in a
scene which speeds things up.


Ken wrote:
> 
> gemelli david wrote:
> >
> > I agree that lights adjustments are necessary. The UFO near the buildings has to
> > be
> > modified. I wanted it to be more visible but, the "light addition" you explain
> > make the lights
> > too bright. I'll work on it.
> > About the rendering time, is a light faster to render when it uses
> > "fade_distance" ?
> > Maybe it is the reason why it is still "fast" to render.
> >
> > Thanks for your comments.
> >
> >                         David GEMELLI
> 
>   I have found using fade distance a fade power generaly slower in most cases.
> At times a lot slower !
> 
>   Then again my use of these functions has been where there are many different
> objects in the path of the light source specified that way. When this happens
> pov has to calculate the different intereactions with the surface finishes
> and colors for each level of light intensity along the path of the ray of
> light from the source.
> 
>   I once noticed when I had a single light source with fade distance and power
> specified inside of a room you could see intensity banding along the length of
> the wall from where the camera and light was to the ends of the room.
> I attribured this to the way Pov caluculates the formula for the function
> believing that it is a stepped linear function instead of a smooth seemless
> integration.
> 
> --
> Ken Tyler
> 
> mailto://tylereng@pacbell.net

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