Basil S. Lewis, MD. wrote:
> 
> noa### [at] writemecom
> 
> I am now learning optics in school, and would like to point out the
> following optic errors in POV-Ray. I don't know how realistic pov is
> supposed to get, but I hope that one day these errors will be fixed.
> 
> 1) When I use media/atmospheric light effects, I don't see the light
> curving when it goes through lens. It keeps going the way it did.
> Morever, if I point a beam into lens and watch where the beam falls on
> the other side, I see that the light kept going as if it wasn't
> affected. Only if I point the camera at the lens do I see the object
> behind the lens in the right way.
> 

Do you mean you there are no caustics? Yes, that is a limitation of standard
raytracing. There are methods to do this, but they are very compute intensive
(they often take FOREVER)... Anyway, the methods exist and might be implemented
in future versions of POV... I hope

> 2) When I make a wall split to two by a small hole along its height, and
> point a light on to it, and then put a board behind, the light just
> projects a staight line (as we would expect) but does not show the wave
> property effects of light. This effect should produce dark areas across
> the board.

Light in POV doesn't have wavelengths... I suppose this has beed in some
specialised optical modelling programs, but it might be too much of too little
for the average user.

> 
> I love POV, like all of us, and would love to see it beat nature ;)

Yeah, well nature does have a bit of a head start over the POV-team...

Margus

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