EMAIL: timothyea@worldnet.att.net
NAME: Tim Attwood
TOPIC: Glass
COPYRIGHT: I SUBMIT TO THE STANDARD RAYTRACING COMPETITION COPYRIGHT.
TITLE: Glass Pavilion
COUNTRY: USA
WEBPAGE: none
RENDERER USED: POVray 3 for Windows
TOOLS USED: POVcad, PC Paintbrush, Conv2jpg
RENDER TIME: 3 Days 5 Hours 34 Minutes
HARDWARE USED: 486/66 DX
IMAGE DESCRIPTION: A pavilion made of glass sits on a shiny yellow glass 
surface with odd patterned disks receding to the mountains.

DESCRIPTION OF HOW THIS IMAGE WAS CREATED: 
  The mountains were created with a height_field from a tga created with 
PC Paintbrush (about 4 hours to render), which was then placed into the 
final scene as an image_map cut-out in order to help shorten the render 
time.
  The disk's layout is set by using random numbers in POVwin3 and a 
#while loop to place 50 or so disks, some of which are off the edge of 
the scene.  The seed value was changed a few times until the effect was 
what I wanted.  The disk in the foreground was placed manually to get it 
just right.  The pattern on the disks is an image_map created with PC 
Paintbrush.  The disks are hollow with clear areas in the pattern.
  The pavilion is made of beams sitting on top of pillars.  The beams 
are the difference of 2 spheres and 3 planes; the inside sphere is 
scaled so that the beam's thickness narrows near the top.  The capstones 
on the pillars are a union of a box and two cylinders with little 
spheres subtracted for detail.  The pillars are a cylinder with smaller 
cylinders subtracted for detail.  The base is a box and a lathe for the 
roundish part (data imported from POVcad).  The glass texture is a light 
cyan with a high filter value.
  The circular placement of the beams and the pillars is accomplished 
with a #while loop.  The number of pillars is set by #declare variable 
and can be easily changed.  Something similar to this could be used to 
place any circular group.
  PAVIL.ZIP contains PAVIL.POV the source, HFTHREE.POV the source for 
the height_field, CIRCLE.GIF the pattern on the disks, HFTHREE.GIF the 
height_field cut-out.