Are you sure the lens effects are to blame? I sometimes get the white spots when
the light source is in line with the camera vector (i.e. the camera is looking
straight into the light)
You could try bounding the media and increasing intervals/samples. And if all
else fails and the LF objects cause the problem, you could use <shudder> post
processing. Let's be honest, it's a fake lens flare either way.

Margus

Ken wrote:
> 
>  How come your lens effects are attenuating my background scattering
> media into oblivion ?
> 
> I have two very small objects say x*.2 y*.05 in the xy plane which are
> opposing each other translated -x +x a wee bit. In between them is a
> light source and lens effect centered at the origin. Behind this is a
> spot light about 50 units in the +z direction pointing back towards
> the camera's location. Because of the scale of the objects the camera
> is necessarily close i.e. z*-.2. I'm presuming that it is your effects
> and the scale of my scene that is causing my beautiful scattering media
> to look like randomly placed white spots.
> 
> Solution or live with it ?
> 
> --
> Ken Tyler -  1200+ Povray, Graphics, 3D Rendering, and Raytracing Links:
> http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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