Hi!

Is there any possibility to render images with a background image instead
of a background color?

Is there any patch for it?

Gevatter

Post a reply to this message

Gev### [at] jpberlinde wrote:
> 
> Hi!
> 
> Is there any possibility to render images with a background image instead
> of a background color?
> 
> Is there any patch for it?
> 
> Gevatter

You could simply add a plane with an image map attached to it.
It is also possible to use an image map with the sky_sphere
but it is distorted by the shape of the feature.

-- 
Ken Tyler -  1200+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

Post a reply to this message

You can use +FN +UA for outputting a 24 bit .png-image with an
alpha-channel. That way, you can easily mask away the background and add an
image in, say, PaintShop pro.

Simen.

Gev### [at] jpberlinde skrev i meldingen
<3844FE00.35C1FE97@jpberlin.de>...
>Hi!
>
>Is there any possibility to render images with a background image instead
>of a background color?
>
>Is there any patch for it?
>
>Gevatter

Post a reply to this message

Simen Kvaal wrote:

> You can use +FN +UA for outputting a 24 bit .png-image with an
> alpha-channel. That way, you can easily mask away the background and add an
> image in, say, PaintShop pro.

Nope, that doesn't work correctly (perhaps a bug?):
I've medias in my scene: As you know, they are colored <rgbt 1>.
If a ray hits a media object, there is a hole on this place in the
alpha-channel, !even if there's an object behind the media! It's 100%
transparent.

Hm. Is my problem clear? I'n not good in expressing myself in english...

Gevatter

Post a reply to this message

Aha! I posted an incorrect solution earlier today, but I've apparently fixed
it. I will defineitly add this to my Camera Effects stuff.

Here is the code.
#local CamLook = <0,0,3>; // Camera's Look_at
#local CamLoc = <0,0.5,-6>; //where the camera's location is
#local cam_z = 2; //the amount of camera zoom you want
#local back_dist = 100; // how far away the background is
#local cam_a = 4/3; // camera aspect ratio
#local cam_s = <0,1,0>; // camera sky vectoy
#local cam_d = vnormalize(CamLook-CamLoc);
#local cam_r = vnormalize(vcross(cam_s,cam_d));
#local cam_u = vnormalize(vcross(cam_d,cam_r)); // camera up vector
#local cam_dir = cam_d * cam_z;
#local cam_right = cam_r * cam_a;

#declare fz = vlength(cam_dir);
#declare fx = vlength(cam_right)/2;
#declare fy = vlength(cam_u)/2;

camera {
  location CamLoc
  up cam_u
  right cam_r * cam_a
  direction (cam_d * cam_z)
}

box { <0,0,0> <1,1,0.1>
      pigment { image_map { png "background.png"
                                             map_type 0
                                             interpolate 2 } }
      translate <-0.5,-0.5,0>
      scale 2*<fx,fy,0.5>
      translate fz*z
      scale back_dist
      #local nz = vnormalize(CamLook-CamLoc);
      #local nx = vnormalize(vcross(cam_s,nz));
      #local ny = vcross(nz,nx);
      matrix <nx.x,nx.y,nx.z,
               ny.x,ny.y,ny.z,
              nz.x,nz.y,nz.z,
              CamLoc.x,CamLoc.y,CamLoc.z> }



Gev### [at] jpberlinde wrote:

> Hi!
>
> Is there any possibility to render images with a background image instead
> of a background color?
>
> Is there any patch for it?
>
> Gevatter

--

Josh English
eng### [at] spiritonecom
ICQ: 1946299
"Stress is when you wake up screaming and realize you haven't fallen asleep
yet."

Post a reply to this message

Gev### [at] jpberlinde wrote:
>Hi!
>
>Is there any possibility to render images
>with a background image instead
>of a background color?
>
>Is there any patch for it?
>
>Gevatter

I think you could use my Illusion Include
File together with a sky_sphere.

Illusion.inc is available from
http://rsj.mobilixnet.dk

Greetings,

Rune

---
Updated November 19: http://rsj.mobilixnet.dk
Containing 3D images, stereograms, tutorials,
The POV Desktop Theme, 350+ raytracing jokes,
miscellaneous other things, and a lot of fun!

Post a reply to this message