Chemlab by Bill Marrs, June 1995
================================

    This is my first serious raytraced image.  I started using raytracers
in April 1995.  What came to mind when I thought of "science" was my
high-school Chemistry class.

    Most of the objects are fairly simple CSGs.  I used a height field for the
powder in the jar and the spilled powder on the table.  The flame is a lathe
object created by PoVSB.  The hose was created using torpatch (the tool used to
make the jumble of cables in info_hwy (a past competition winner).

Tools:
=====
    PoVSB         A windows modeler.  I used this to create every object
                  except for the rubber hose.  
    Winpov08      A Windows compile of Povray.  While I didn't use it
                  for the image you see presented, I did use it quite a bit
                  while working on the scene.
    Torpatch      A DOS utility for creating tubes.  I used this to
                  create the rubber hose.
    ColorRender   A DOS color/normal tool.  I used this for some of the
                  textures I needed in my image.
    Lview         A Windows picture files manipulator.  I used this to
                  convert my targa image into jpeg.
    Pentpov       A Pentium enhanced compile of Povray.  I used this several
                  times along the way and for the final render.

    All of these tools are available at the Povray ftp site (ftp.povray.org),
excluding Winpov.08.
              
Image:
=====
    The image you see was rendered on a 132 MHz IP22 Silicon Graphics
    workstation.  

    POV-Ray Options in effect: +v1 +fd +mb25 +a0.300 +j1.000 +r3 -q9 -w800
	-h600 -s1 -e600 -k0.000 -mv2.0 -ichemlab.pov  
    Resolution 800 x 600

    # Rays:     3693002    # Pixels:      480800  # Pixels supersampled: 44055
    Ray->Shape Intersection Tests:
    Type             Tests    Succeeded   Percentage
    -----------------------------------------------------------
    Sphere         33403259     4441333       13.30
    Triangle         189405       19068       10.07
    Box            56448205    11327810       20.07
    Cone           52880702    18826048       35.60
    Quartic\Poly    4259788     2982735       70.02
    Height Fld     31019059     4714907       15.20
    Bounds         22962285     4259788       18.55
    Clips            210950       67325       31.92
    Calls to DNoise:      417898
    Shadow Ray Tests:   18794015     Blocking Objects Found:     6382771
    Reflected Rays:      1649194
    Refracted Rays:      1375257
    Transmitted Rays:       4881
    I-Stack overflows:        21
    Time For Trace:    1 hours 42 minutes 3.00 seconds
    
Files:
=====
    chemlab.psb  - The PovSB modeler file.
    chemlab.pov  - Povray scene file as generated by PoVSB (with some
                   minor pathname changes to enable better portability)
    include.inc  - A file used by PoVSB to allow for includes, here is
                   where I include the hose and some random definitions I
                   needed for textures that I created.
    mydefs.inc   - A files which contains a few textures that I needed to
                   create myself.
    hose.dat     - This is the data file I used with Torpatch to create
                   the rubber hose.
    hose.inc     - This file was generated by torpatch from hose.dat
    flame.gif    - The image_map for the flame on the Bunsen burner.
    page.gif     - The image_map of the notebook page.
    powder.gif   - The height field for the powder in the jar.
    spill.gif    - The height field for the powder spilled on the
                   table.
Comments?
=========
    Please email any comments or criticisms to bill@atria.com.