POV-Ray : Newsgroups : povray.binaries.images : One more light dome based test image Server Time
15 Nov 2024 06:15:23 EST (-0500)
  One more light dome based test image (Message 1 to 3 of 3)  
From: Edouard Poor
Subject: One more light dome based test image
Date: 30 Jul 2008 17:15:00
Message: <web.4890d961cf7eef0fa8993fbc0@news.povray.org>
One more image rendered with a light dome auto-generated from an HDR lightprobe.
This scene has 200 area lights; each just 3x3 with jitter and orient.

The central sphere's dull reflection is simply phong highlights to the 200 light
sources (and microfacets to give it a slightly rougher appearance).

The floor is just a plane with an image, a bump map, and a specular map setting
the variable reflection.

Finally I photoshopped it to give it a slightly more "photographic" appearance
(a glow
effect, a lens distortion, and adding slight noise into the darker areas of the
scene). The impact was minor, but I think helps. People have code to
do those things inside POV, but I just prefer using Photoshop.

Cheers,
Edouard.


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Attachments:
Download 'phong-200-lights.jpg' (230 KB)

Preview of image 'phong-200-lights.jpg'
phong-200-lights.jpg


 

From: Jan Dvorak
Subject: Re: One more light dome based test image
Date: 30 Jul 2008 19:42:39
Message: <4890fc6f$1@news.povray.org>
Edouard Poor napsal(a):
> One more image rendered with a light dome auto-generated from an HDR lightprobe.
> This scene has 200 area lights; each just 3x3 with jitter and orient.
> 
> The central sphere's dull reflection is simply phong highlights to the 200 light
> sources (and microfacets to give it a slightly rougher appearance).
> 
> The floor is just a plane with an image, a bump map, and a specular map setting
> the variable reflection.
> 
> Finally I photoshopped it to give it a slightly more "photographic" appearance
> (a glow
> effect, a lens distortion, and adding slight noise into the darker areas of the
> scene). The impact was minor, but I think helps. People have code to
> do those things inside POV, but I just prefer using Photoshop.
> 
> Cheers,
> Edouard.
> 
> 
> 
> ------------------------------------------------------------------------
> 
I like the chromatic abberation


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From: Edouard Poor
Subject: Re: One more light dome based test image
Date: 30 Jul 2008 20:35:00
Message: <web.489107dfe8f12e8717e538890@news.povray.org>
Jan Dvorak <jan### [at] centrumcz> wrote:

> > Finally I photoshopped it to give it a slightly more "photographic" appearance
> > (a glow
> > effect, a lens distortion, and adding slight noise into the darker areas of the
> > scene). The impact was minor, but I think helps. People have code to
> > do those things inside POV, but I just prefer using Photoshop.
>
> I like the chromatic abberation

The chromatic aberration is part of the lens distortion in Photoshop. Actually
there is a filter called "Lens Correction", but you can take a clean image
(i.e. ray traced) and apply barrel distortion, chromatic aberration and
vignetting instead of the more usual case of removing them from a photographic
image. The only (slight) limitation with the filter is that it can't work on
32bit (HDR) images, only 16bit ones. In practice it's pretty good.

I got the idea from Tek's amazing RSOCP image:
http://teknof.deviantart.com/art/YARSOCP-53555325 but used Photoshop rather
than doing the effect "in camera".

The other two effects added in Photoshop were done by hand: the glow and adding
noise to darker areas.

Cheers,
Edouard.


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