POV-Ray : Newsgroups : povray.newusers : Help understanding Image Maps : Re: Help understanding Image Maps Server Time
29 Jul 2024 16:33:32 EDT (-0400)
  Re: Help understanding Image Maps  
From: Kyle
Date: 28 Jul 2005 20:49:20
Message: <84uie1lgo26h2ivmgibbsnib2uc2tfclff@4ax.com>
On Thu, 28 Jul 2005 15:12:33 EDT, "David" <nomail@nomail> wrote:

>The "final" product is available for all to see here:  www.zigaero.com

Looks good!

>I still don't understand why the image is reflected on the "back side" of
>the cylinder.  

Section 3.5.1.5.1 of the help file explains it pretty well.  Unlike
pigments based on color mapped patterns, which vary in the direction
of all three axis, image mapped pigments vary in the x and y direction
only and are "projected" along the z axis.  

If you can imaging a movie screen with an image projected on it, when
you walk around to the back side of the screen, the image is reversed.
This is the same effect you will see in POV-Ray if you use an
image-mapped pigment on an object.  Turn the object around and the
image is reversed on the back side.

I hope this explains it well enough for you to understand.


Kyle


Post a reply to this message

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.