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Another unofficial patch: Different sky sphere pigments for background,
reflection/refrction, and radiosity (here: blue, red and green,
respectively, with one reflective and one refractive sphere on a
black-and-white checkered plane).
Post a reply to this message
Attachments:
Download 'skysphere.png' (321 KB)
Preview of image 'skysphere.png'
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> Another unofficial patch: Different sky sphere pigments for background,
> reflection/refrction, and radiosity (here: blue, red and green,
> respectively, with one reflective and one refractive sphere on a
> black-and-white checkered plane).
Stop teasing us. We want RC4 NOW!
Not for every scene, but opens some interesting avenues. One
applications I can see: High resolution HDR on a sky_sphere that is
normaly visible, and a low resolution, blured HDR used for radiosity.
Should work good when you have some small and very bright areas.
Alain
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Am 11.12.2011 00:13, schrieb Alain:
>> Another unofficial patch: Different sky sphere pigments for background,
>> reflection/refrction, and radiosity (here: blue, red and green,
>> respectively, with one reflective and one refractive sphere on a
>> black-and-white checkered plane).
>
> Stop teasing us. We want RC4 NOW!
Heh heh :-P
You should indeed not hold your breath for this patch. It's still quite
experimental, and chances are it won't make it into 3.7.0 at all.
> Not for every scene, but opens some interesting avenues. One
> applications I can see: High resolution HDR on a sky_sphere that is
> normaly visible, and a low resolution, blured HDR used for radiosity.
> Should work good when you have some small and very bright areas.
Yup.
Or to avoid double illumination from both radiosity and conventional
lighting in case you've set up a light dome to match the sky sphere.
(You would specify "pigment { color rgb 0 }" in that case for the
radiosity sky sphere.)
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clipka <ano### [at] anonymous org> wrote:
> Am 11.12.2011 00:13, schrieb Alain:
> >> Another unofficial patch: Different sky sphere pigments for background,
> >> reflection/refrction, and radiosity (here: blue, red and green,
> >> respectively, with one reflective and one refractive sphere on a
> >> black-and-white checkered plane).
> >
> > Stop teasing us. We want RC4 NOW!
>
> Heh heh :-P
>
> You should indeed not hold your breath for this patch. It's still quite
> experimental, and chances are it won't make it into 3.7.0 at all.
>
How about starting a new Megapov?
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Am 12.12.2011 05:27, schrieb jhu:
> clipka<ano### [at] anonymousorg> wrote:
>>
>> You should indeed not hold your breath for this patch. It's still quite
>> experimental, and chances are it won't make it into 3.7.0 at all.
>
> How about starting a new Megapov?
I do intend to release all my own experimental features to the public
though, either as part of POV-Ray proper or as part of my own unofficial
branch of POV-Ray. But unless I should happen to come across some 3rd
party patches that I /personally/ find indispensable, I don't have the
ambition to start a collection of patches from various authors.
But anyway, first the "legal dust" needs to settle around POV-Ray 3.7.
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On 12/10/2011 11:09 AM, clipka wrote:
> Another unofficial patch: Different sky sphere pigments for background,
> reflection/refrction, and radiosity (here: blue, red and green,
> respectively, with one reflective and one refractive sphere on a
> black-and-white checkered plane).
Would this have the same effect using three spheres in the current RC?
//THIS IS THE BACKGROUND IMAGE
sphere {<0,0,0>,1600
texture{
pigment {
image_map {jpeg "background.jpg" interpolate 2 map_type 1 }
}
finish{diffuse 0 ambient 0 emission 1 specular 0 phong 0 reflection{0}}
}
rotate y*0 //enter sky rotation here in degrees
no_shadow
no_radiosity
no_reflection
hollow
}
//THIS IS THE REFLECTION
sphere {<0,0,0>,1500
texture{
pigment {
image_map {hdr "reflection.hdr" interpolate 2 map_type 1 }
}
finish{diffuse 0 ambient 0 emission 1 specular 0 phong 0 reflection{0}}
}
rotate y*90 //enter sky rotation here in degrees
no_image
no_shadow
no_radiosity
hollow
}
//THIS IS THE ENVIRONMENT FOR LIGHTING
sphere {<0,0,0>,1400
texture{
pigment {
image_map {hdr "lighting.hdr" interpolate 2 map_type 1 }
}
finish{diffuse 0 ambient 0 emission 1 specular 0 phong 0 reflection{0}}
}
rotate y*0 //enter sky rotation here in degrees
no_image
no_shadow
no_reflection
hollow
}
I have been using this for a few months now and it works well. Having
this effect on the sky sphere will simplify its application.
FlyerX
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Am 12.12.2011 22:06, schrieb FlyerX:
> On 12/10/2011 11:09 AM, clipka wrote:
>> Another unofficial patch: Different sky sphere pigments for background,
>> reflection/refrction, and radiosity (here: blue, red and green,
>> respectively, with one reflective and one refractive sphere on a
>> black-and-white checkered plane).
>
> Would this have the same effect using three spheres in the current RC?
Yup. Except of course that the sky sphere has an infinite radius, while
normal spheres have a finite one.
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On 12/12/2011 11:21 PM, clipka wrote:
> Yup. Except of course that the sky sphere has an infinite radius, while
> normal spheres have a finite one.
Actually, technically speaking, a sky_sphere is a sphere of radius 1
which is centered at the origin of the current ray. It's just that it's
evaluated only if the ray doesn't hit anything (thus making it only
appear on the parts of the image where the nothingness of the background
would otherwise be visible).
A sky_sphere is also faster than a regular sphere because no actual
ray-sphere intersection calculations are needed. (The color is taken
from the sky_sphere just using the direction of the ray using simple math.)
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clipka <ano### [at] anonymousorg> wrote:
> Another unofficial patch: Different sky sphere pigments for background,
> reflection/refrction, and radiosity (here: blue, red and green,
> respectively, with one reflective and one refractive sphere on a
> black-and-white checkered plane).
Interesting.
Hey, speaking of sky_spheres, how hard would it be to implement textured fog
(fog which is colored by a sky_sphere pigment)? Doing it in POV-SDL is not very
fun, since a whole new scene management scheme is needed for it to work... but
textured fog as an inherent feature would be easy to use, and would really help
some scenes :)
~Sam
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Am 18.12.2011 01:50, schrieb Samuel Benge:
> clipka<ano### [at] anonymousorg> wrote:
>> Another unofficial patch: Different sky sphere pigments for background,
>> reflection/refrction, and radiosity (here: blue, red and green,
>> respectively, with one reflective and one refractive sphere on a
>> black-and-white checkered plane).
>
> Interesting.
>
> Hey, speaking of sky_spheres, how hard would it be to implement textured fog
> (fog which is colored by a sky_sphere pigment)? Doing it in POV-SDL is not very
> fun, since a whole new scene management scheme is needed for it to work... but
> textured fog as an inherent feature would be easy to use, and would really help
> some scenes :)
It should be pretty easy to implement. All it would take is to pick the
fog color from a sky_sphere instead of using a constant.
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