In article <3d28a6a1@news.povray.org>, "Paragon" <use### [at] hostcom> wrote:

> I came across a Lightwave 7 review and it featured a picture to show
> Lightwave's caustic capabilities.  The picture is fairly simple so I decided
> to try and duplicate it in POV-Ray 3.5 rc6.  The first picture is from
> Lightwave (in case it posts in reverse order, the one with the brighter
> glass spheres) and the second picture is what I rendered.  The most notable
> differences are caustics that appear on the blue wall (I don't know how they
> achieved the caustics to appear white) and the subtle highlights and shadows
> on the red wall in Lightwave's render (I'm not sure how to get that effect
> either).  Oh yeah, and the light on the ceiling in my render does not appear
> to be "in the ceiling" (although it is...it shows if I don't render with
> radiosity) and the shadows aren't as soft.

The metal balls in your image have a fairly blurry texture, the 
Lightwave ones have barely any blur at all. The camera is slightly 
off...look how the room corners meet the image corners in the Lightwave 
room. Also, the POV room looks like it is about twice the size of the 
Lightwave room, judging from the reflections...it looks like there is a 
wall just behind the camera in the Lightwave room, and one twice as far 
away in the POV one. And I think the POV glass objects look washed out 
in comparison because the texture isn't entirely transparent...I like to 
use a 100% transparent pigment and some attenuation or media in glass 
materials.

As for the shadows...your area light might be half as big as it should 
be. And it looks like you might have left the default ambient values in.

Source code?

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/

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