TITLE: Stained Glass Study
NAME: Todd Tuskey
COUNTRY: USA
EMAIL: 76634.2652@Compuserve.Com
TOPIC: GLASS
COPYRIGHT: I SUBMIT TO THE STANDARD RAYTRACING COMPETITION COPYRIGHT.
JPGFILE: ttwindow.jpg
RENDERER USED: POVRAY 3.0
TOOLS USED: (pencil & graph paper), Paint Shop Pro to add name
RENDER TIME: 6.5 Hours
HARDWARE USED: Pentium 90
IMAGE DESCRIPTION: 
This image is of several stained-glass windows embedded in a stone wall 
(typical of a church). The sea is barely visible on the horizon behind the
windows outside.
Inside, the windows are visible in three different capacities: the windows
themselves, the reflection of the windows on a highly polished marble floor,
and (this is the neat part) the light shining through the windows is 
projected onto the floor.  The three different aspects of the windows are 
nicely balanced in the scene.


DESCRIPTION OF HOW THIS IMAGE WAS CREATED: 
In all windows, the dark "bars" seperating panes are just cylinders and
torus differences with a lead-like texture.
The center window is a combination of various stained glass examples I have
seen.  The outer circles used two-color color maps in a radial pattern. 
I thought of making colored "pie" shapes, but the CSG proved too time 
consuming.  I figured I'd let the pigment do the work.
The same trick is used in the two side windows with the boats in them.
When I was developing the side windows I didn't throw in any filter or 
transmit values for the panes until I was finished.  So I had a nice effect
for the water.  You can't tell in the finished image (I can't figure out why),
but the water was gradually getting a darker blueish pigment as the "sea"
went lower (I was decreasing the blue portion of RGB by 5 0.000000e+00ach level I went
down).
So, the final panes (lots of triangles for the boat and around the boat) is
are given filter and transmit values that would both show the glass' color as
it is being looked at, while also coloring the light passing through it.