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  Copyright (C) Steve Koren 1988

  This program may be freely distributed but not sold for profit.
  This notice must be included on ALL copies.

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NOTES ON AMIGA VERSION OF QRT:


There are three executable files:

  QRT     :   the ray tracer itself

  QRTPost :   Post processor

  RAY2    :   Ham file creator by D. Wecker (same one as used
              by DBW Ray tracer.


There are three steps in creating an image with QRT.  First,
QRT is run on an input file to produce a file with suggested
extention .RAW.  This file is quite large - nearly 400K - so
there must be this much room on the disk.  I recommend a RAM
drive if you have enough memory.  This file exists to maintain
QRT portability across computers.

Next, QRTPost is used to prepare the image for processing with
RAY2:

        QRTPost IMAGE.RAW IMAGE.TMP

The second file is the output file and must be given an entension
of .TMP.  This step will take only a few seconds if both files are
on the RAM drive, and will result in a smaller file.  The first
file (.RAW) may now be deleted.

Lastly, the RAY2 program (Copyright D. Wecker) is used to create
a HAM image.  This program is included with the DBWRender ray
tracer, and does a fine job of creating HAM files, so I saw no
reason to re-invent the wheel.  It is run like this:

        RAY2 IMAGE

Where Image is the .TMP file.  RAY2 will create a file IMAGE.ILBM
after it displays the picture.  When RAY2 is done writing the HAM
file (it will highlight the first pixel of each line as it writes
the file, and flash the screen at the end), you may click in the
close box.  The resulting HAM file may be displayed with any
public domain HAM display program, or modified with some paint
programs.

See the QRT documentation files for more details of QRT.