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Hi everyone. Here's an example of how unclipped radiosity values work in
POV-Ray 3.6. I think the image is pretty much self-explanatory, but if
you have a question about it, feel free to ask.
With unclipped radiosity values it is now easier to make an ambient
object cast light more realistically. Of course, you still have to use a
high count and low error_bound.... but it can be worth the extra render
time.
-Sam Benge
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Attachments:
Download 'radiositest.jpg' (79 KB)
Preview of image 'radiositest.jpg'
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Skip Talbot wrote:
> That's quite an improvement. Thanks for posting an example, as I'm sure
> many of us couldn't quite grasp what had changed. Now, can I wait for an
> HDRI equipped POV 3.6 :)
>
> Skip
Skip,
With these new changes it is possible to make images using hdri and
radiosity. For a false-color (color that you add) implementation, use an
image_map mapped to a sky_sphere, and give the new colors ridiculously
high values.
An example might look something like this:
sky_sphere{
pigment{
pigment_pattern{
image_map{
tga"my_image.tga" interpolate 2 map_type 1
}
}
color_map{
[0 rgb 0]
[.5 rgb<1 2 10>]
[1 rgb 10]
}
}
}
You can make your own color_map for an image by placing the image_map
statement inside a 'pigment_pattern' block.
Standard pitfalls and benefits usually associated with hdri imaging
probably apply to doing this.... you might want to use a low-res image
for the hdri, and a hi-res image to be viewed in the background. Might
have to make one of the sky_spheres a real sphere with no_image added...
-Sam Benge
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