POV-Ray : Newsgroups : povray.beta-test : Highlight bug : Highlight bug Server Time
21 Sep 2023 22:33:11 EDT (-0400)
  Highlight bug  
From: Rune
Date: 28 Sep 2001 15:27:04
Message: <3bb4cf08@news.povray.org>
When normals are used, highlights are sometimes visible where they should be
in shadow. I think a similar bug existed for reflection in POV-ray 3.0 but
it was fixed. It was not fixed for highlights though. The following scene
shows visible highlights from a light that is on the opposite side of the
surface than the camera. Clearly that should be fixed.

Can someone please confirm this bug?

// camera in front of box:
camera {location -2.5*z look_at 0}
// light_source behind box:
light_source {1000*z, color 1}
background {color <0.6,0.8,1.0>}
box {
   <-1,-1,0>, <1,1,0>
   pigment {color rgb 0}
   normal {bumps 6 scale 0.2}
// phong and specular shows up ???
   finish {phong 1}

3D images and anims, include files, tutorials and more:
Rune's World:    http://rsj.mobilixnet.dk (updated June 26)
POV-Ray Users:   http://rsj.mobilixnet.dk/povrayusers/
POV-Ray Webring: http://webring.povray.co.uk

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