POV-Ray : Newsgroups : povray.binaries.images : Out of reach : Re: Out of reach Server Time
14 Aug 2024 01:20:49 EDT (-0400)
  Re: Out of reach  
From: Rune
Date: 15 Feb 2003 07:29:41
Message: <3e4e32b5$1@news.povray.org>
Lance Birch wrote:
> There's only one problem I can see with the image:
> there's a little ghost happening from where your image
> has been placed... you probably really need to do
> another map to make the areas that are transparent,
> also void of any diffuse and specular/phong highlight
> values - that should eliminate the problem completely
> (though it's hardly visible anyway).

I'm not sure I understand this. I probably should know, but what exactly
does ghost mean in this context? And how is it related to diffuse and
highlights?

> set some marker dots out, 3 or more on the same plane
> and one perpendicular to the plane (for example, 3 dots
> at known positions on the floor, and one on the wall
> vertically above one of the other dots).  This will
> help greatly when working out the exact perspective
> and allows you to create a virtual set of the market
> dots with which to align to the real dots.

Oh, but I didn't need this, as the floor I was standing on had a
tile-like pattern, and the mirror had vertical edges. Plenty of
information to determine the exact perspective. The trouble was placing
the camera in the POV-Ray scene in a way so that the perspective in the
POV-Ray image would match exactly that in the photo. I had to fiddle not
only with location, look_at and angle, but also with skewing of the
camera (done with a matrix). Having so many camera variables to adjust
is the tricky part.

> giving it a dark blue cast (or dark blue but only in
> the lower end, i.e. raise the blue channel values but
> only for the blues below 30 - this will give the
> entire image a cool deep blue cast, which would
> contrast well with the heart's hot colour).

I'll try that. I think it'll work well. Thanks of the suggestion.

Rune
--
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rune|vision:  http://runevision.com (updated Oct 19)
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