I've noticed on renders from two Windows machines, using the Official,
precompiled 3.1e engine, that putting caustics into a `finish' block rather
than an `interior' block not only generates warnings, but also generates
caustic-effects that appear to be much brighter than the ones in 3.0 (one
viewer of my scenes actually asked how I was able to get a `reverse shadow').
Moving the caustics out of the `finish' and into the `interior' makes the
caustic-effect look like it should.
    This reminds me, somewhat, of what happened when I once tried using a
colour-vector of `rgbft 1', which cause the object that it was applied to to be
`supertransparent', brightening everything that showed through it. I've yet to
scan through the source-code, for the super-caustic effect, but my guess would
be that POV-Ray is seeing the old syntax, which causes it to do the
calculations the old syntax (`in the old way'), and then does it /again/ for
`the new way', increasing the final effect.
    My thought is that this reaction to the old-style syntax for caustics
should probably be changed (even though it's being phased out, it /is/ supposed
to be supported, for now). I haven't tried the supertransparency effect with
3.1, so I don't know if anyone's changed it, but I actually thought that it was
a neat feature;).

                -Rozzin.

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