POV-Ray : Documentation : A Historic 'Version History'
  POV-Ray 3.6 Documentation Online View The Name   1.1.6 How Do I Begin? A Historic 'Version History'

The version history as it was included in PV-Ray 0.5 BETA. Notice the name changes...

Persistence of Vision Raytracer Version History

 PV-Ray was originally DKBTrace Ver. 2.12 written by David Buck. He 
donated the rights to his source code so the PV-Team could enhance
this raytracer as a group project similar to Fractint. The source
code for PV-Ray will always be freely distributable subject to the
restrictions in the header files. Thanks David, for your generous
Version 0.02 BETA Release 7/29/91 (as STAR-Light)
 First version is still basically DKBTrace 2.12 with a few new
 - Materials mapping added by Drew Wells.(see matmap.dat)
 - ONION & LEOPARD textures added by Scott Taylor.
 - Time to trace display added by Bill Pulver.
 - Grayscale display (+g) for IBM-PC's added by Scott Taylor.
 - Small wood texture bug fixed to create true cylinders.
 - Verbose now displays more info including file being traced.
 - Option +vO added to enable old-style terse verbose.
 - Texture.c broken into smaller modules.
 - PAINTED1, 2, & 3 added for developers.
 - BUMPY1, 2, & 3 added for developers.
PvRay Version 0.5 BETA Release 9/07/91
 Many more changes this time around, including...

- Many enhancements from Alexander Enzmann
   - Bezier bicubic subpatches
   - Polynomial surfaces
   - New mapping types (sphere, etc.)
   - Sturmian sequences
   - Clipping shapes
   - (have I forgotten anything??)
- Lots of hard work and enhancements by Aaron Collins
- Height fields by Doug Muir
- Bump Mapping by Doug Muir and Drew Wells
- Interpolation by Girish T. Hagan adapted for mapping by Drew Wells
- # and ; are now ignored. 
- case_sensitive keywords and commandline option added by Drew Wells
  > case_sensitive_yes -- All words checked for exact case.
                             Keywords must be in upper case.
                             (*Old DKB Style*)
  > case_sensitive_no  -- Case is ignored for all words.
  > case_sensitive_opt -- DEFAULT - All words checked for exact
                             case except keywords. Keywords will be
                             accepted in upper and/or lower case. 
  > command line -- /ty = yes, /tn = no, /to = opt
- cnvdat.c to convert old dat files included with pvsrc.
- C++ style commenting - // ignore to end of line. 
  and /* ignore between braces */ nesting not allowed.
- New default style verbose trace info (+v1) 
- Old-new style verbose (+v0)
- Verbose trace info outputs to stderr so that stats can be
  redirected to file.
- New stats display outputs to stdout for better redirection.
- New lighting routines by David Buck.
- The declared colors Red, Green, and Blue in colors.dat are now
  CRed, CBlue, CGreen.
- The declared quadric Sphere in shapes.dat is now QSphere.
- Textures.dat has been cleaned up and commented. The Name   1.1.6 How Do I Begin?

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