"Stephen Klebs" <skl### [at] gmailcom> wrote:
> The sIBL method is especially nice: using 3 image maps, one as a background, one
> as reflection, and one as a lighting environment. Have you had any method of
> using an image map as just a light source and another as just a source of
> reflection? I would imagine two surrounding spheres, an outer sphere that acts
> just as a light map for illumination, and a slightly inner sphere that lets
> light pass through but visible only on reflective surfaces.

I tend to use only one map, the full HDR panorama.  This gets both reflected and
is used to generate the lighting in my light system.  The lighting method I use,
being a rational method that samples the map and proportions using a median-cut
method, would likely not gain any advantage using the lower resolution
'convoluted' map.  I typically also use it for the background, but will usually
try to obscure it or focal blur it.  I may try the high-res background plate
sometime, but then you get restricted on your viewing angle.

-tgq

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