Christoph Hormann wrote:
> 
> Lutz-Peter Hooge wrote:
> >
> > Hi everybody,
> >
> > I have the problem that photons are nearly invisible on surfaces with
> > normals. It may be a bug, maybe it is realistic, but it is very annoying,
> > because surfaces without normals usually don't look good (unless they are
> > Isos with much "true" detail, but I didn't test yet if those work better
> > with photons).
> >
> 
> I experienced the same, see for example the balcony demo scene in Povray
> 3.5.  If you remove the normal of the cloth, the caustics on the table are
> much stronger.
> 
> I'm not sure if this should be considered as a bug, a test with normals
> and heightfield/isosurface alternative would clarify things.

I wouldn't necessarily classify this as a bug. It is more a limitation
with the implementation of the normal perturbation method that POV-Ray
uses.

-- 
Ken Tyler

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