Things I have learned to make POV-life easier:

For area light(s) and media, have media interaction off and no
shadow, and a point light at the same location with media
interaction on and no shadow.

For media-filled containers, give the object no shadow, and make
a duplicate object with a simple texture to cast the shadow with
no image and no reflection.

For objects with IOR that are only there for photon effects, use
no image on the refractive object.

For a light whose interaction with media is only in a small area
of the scene, make a media object surrounding the relevant space
with absorbtion a negative amount of the scattering; this will
remove the scattering of ambient light and only scatter the desired
light source.

For objects with transparent textures maps, if the alpha channels
of the textures are showing as opaque, make the object hollow.


Additions welcome!

-- 
Tim Cook
http://home.bellsouth.net/p/PWP-empyrean

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