"Samuel Benge" <stb### [at] hotmailcom> wrote in message 
news:web.4abbebd7c22ec3f4865621b80@news.povray.org...
>
> To me it does not appear to be existing behind the surface of my monitor. 
> For
> your image to appear as such, the margin of the image would have to be
> partially shaded, as if the case of the monitor itself were casting a 
> shadow
> onto the objects below.

Well the light is coming from a rectangle precisely covering the area of the 
image, but outside of that there's a background brightness of 0.5 to keep 
the lighting nice and soft. If I wanted it to just look like a scene inside 
your monitor I'd enclose it in a box, but I'm going more for a window into 
another world type effect.

> 24 hours is a long time for a render to complete.

True but it's a completely un-optimised scene. I just left it running in the 
background at work and didn't really notice how long it was taking!

-- 
Tek
http://evilsuperbrain.com

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Tek schrieb:

> Well the light is coming from a rectangle precisely covering the area of the 
> image, but outside of that there's a background brightness of 0.5 to keep 
> the lighting nice and soft. If I wanted it to just look like a scene inside 
> your monitor I'd enclose it in a box, but I'm going more for a window into 
> another world type effect.

Somehow I think that approach is flawed: If the monitor was really a 
window to some other world, from the "other side" that window wouldn't 
appear uniformly lit.

Maybe you should use a more elaborate setting to simulate the "outside" 
illumination; a HDR light probe of some office would be ideal.

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Tek wrote:
> 
> The image took almost exactly 24 hours to render, thanks to the rather high 
> quality radiosity & blur!
> 
>

That's proper poving there. Code for half an hour then wait for the 
magic to happen. Nice wallpaper lighting idea.

  -Shay

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"Tek" <tek### [at] evilsuperbraincom> wrote in message 
news:4abbbcc7@news.povray.org...
>I have been using this snow leopard wallpaper image 
>http://uneasysilence.com/media/2009/07/Rocks.jpg on my desktop at work (on 
>a vista machine) for a few days, and it struck me that something about the 
>image makes it look really 3D, as if it's really some pebbles sat just 
>behind the glass of my monitor.
>
> Anyway I wanted to devise a way of getting this effect in povray, so I did 
> the obvious things: objects arranged close to the plane of the image, lots 
> of focal blur, soft radiosity-lighting. But then I came up with an unusual 
> idea:
>
> I've illuminated the scene using a rectangle placed at the "position" of 
> the screen. i.e. I've placed the camera where my eyes are in my usual 
> seating position, and created a glowing (invisible) rectangle exactly 
> covering the area where my monitor would be, with the objects just behind 
> that. This glowing rectangle is meant to simulate lighting coming in from 
> the office, as if the monitor is a window into another world. I could 
> perhaps get a better effect with a gradient or even an HDR photo of myself 
> from the monitor's point of view! But the simple light box has achieved a 
> nice result.
>
> So basically, aside from the blur, this image is what you'd see if these 
> objects existed just behind the glass of your monitor, and were 
> illuminated by light coming through your screen! The blur helps the 
> illusion of depth, possibly just because it's a good depth cue, or maybe 
> it's harder for your stereoscopic vision to judge the depth of a blurry 
> shape, or something... not sure.
>
> Anyway, I like the result and it seems to make quite nice wallpaper 
> (though TBH I still prefer the pebbles photo).
>
> The image took almost exactly 24 hours to render, thanks to the rather 
> high quality radiosity & blur!
>
> -- 
> Tek
> http://evilsuperbrain.com
>
I'm having a real hard time getting a light box to work correctly, I dont 
suppose you mind sharing that bit of code?

Cheers Dre

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"Dre" <and### [at] gmailcom> wrote in message 
news:4ac1379d@news.povray.org...
>
> I'm having a real hard time getting a light box to work correctly, I dont 
> suppose you mind sharing that bit of code?

I needed a light box I could see through from behind so it's a little wierd:

plane {
 z, 0
 clipped_by { box { -1,1 } }
 scale <image_width/image_height,1>*.5+z

 hollow

 texture { pigment { rgb 1 } finish { diffuse 0 ambient 2 } }
 interior_texture { pigment { rgbt 1 } }
}

camera {
    right x*image_width/image_height
    up y
    direction 2*z
    location -2*z
}


-- 
Tek
http://evilsuperbrain.com

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"Tek" <tek### [at] evilsuperbraincom> wrote in message 
news:4ac25445@news.povray.org...
> "Dre" <and### [at] gmailcom> wrote in message 
> news:4ac1379d@news.povray.org...
>>
>> I'm having a real hard time getting a light box to work correctly, I dont 
>> suppose you mind sharing that bit of code?
>
> I needed a light box I could see through from behind so it's a little 
> wierd:
>
> plane {
> z, 0
> clipped_by { box { -1,1 } }
> scale <image_width/image_height,1>*.5+z
>
> hollow
>
> texture { pigment { rgb 1 } finish { diffuse 0 ambient 2 } }
> interior_texture { pigment { rgbt 1 } }
> }
>
> camera {
>    right x*image_width/image_height
>    up y
>    direction 2*z
>    location -2*z
> }
>
>
> -- 
> Tek
> http://evilsuperbrain.com
>
>
>
Wonderful, thanks very much.  Thats completely different to how I was trying 
so probably why mine failed miserably!

Cheers Dre

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