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Hello everyone,
I've been working with Photons, IOR values and lights.
I have an adaptive light that is set to a location of <2, .5, 0>
I want this to look through a sphere I have sitting at Origin, but the
light seems to point Straight down..
do I have to use parallel lights to get this to work, or spot lights?
Thanks
D
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Not that I know much about these things, but I'm
doing something similar right now (see Old paperweights
in p.b.i).
What is your sphere's radius? The light is slightly above
and to the right of origin. What photon effects are you
expecting and where? Not sure what is or isn't
working. Maybe you can post most of the script so we
can check it out.
Harold
"Dave Bates" <dab### [at] msn com> wrote in message
news:3ce41148$1@news.povray.org...
> Hello everyone,
> I've been working with Photons, IOR values and lights.
>
> I have an adaptive light that is set to a location of <2, .5, 0>
>
> I want this to look through a sphere I have sitting at Origin, but the
> light seems to point Straight down..
> do I have to use parallel lights to get this to work, or spot lights?
>
> Thanks
> D
>
>
>
>
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Thanks for the response Harold.
I did see your Image, and it was amazing..
Basically I'm trying to Understand Photons, IOR and such... I want to get a
light to shine through the Glass Orb I made, and Refract on the the Plane to
the other side..
I have turned on photons, so I could see what those really do.. basically
I've read and now I'm playing..
Here is the orb Script:
sphere {
0, 2
texture {
pigment { RedClear } //For now, will be glass later
finish { F_Glass5 }
}
interior { ior 1.76 }
translate y*1
photons {
target
reflection on
refraction on
collect off
}
}
Basic stuff really.. If you want I can mail you the "Test" photo..
"Harold Baize" <bai### [at] itsaucsfedu> wrote in message
news:3ce424ba$1@news.povray.org...
> Not that I know much about these things, but I'm
> doing something similar right now (see Old paperweights
> in p.b.i).
>
> What is your sphere's radius? The light is slightly above
> and to the right of origin. What photon effects are you
> expecting and where? Not sure what is or isn't
> working. Maybe you can post most of the script so we
> can check it out.
>
> Harold
>
> "Dave Bates" <dab### [at] msncom> wrote in message
> news:3ce41148$1@news.povray.org...
> > Hello everyone,
> > I've been working with Photons, IOR values and lights.
> >
> > I have an adaptive light that is set to a location of <2, .5, 0>
> >
> > I want this to look through a sphere I have sitting at Origin, but
the
> > light seems to point Straight down..
> > do I have to use parallel lights to get this to work, or spot
lights?
> >
> > Thanks
> > D
> >
> >
> >
> >
>
>
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Do you have a line like:
global_settings { photons { count 50000 } }
There are other ways of doing it, and obviously the count value needs to be
adjusted to suit. But you need something in the global_settings to turn
photons on.
"Dave Bates" <dab### [at] msncom> wrote in message
news:3ce4297d$1@news.povray.org...
> Thanks for the response Harold.
>
> I did see your Image, and it was amazing..
> Basically I'm trying to Understand Photons, IOR and such... I want to get
a
> light to shine through the Glass Orb I made, and Refract on the the Plane
to
> the other side..
> I have turned on photons, so I could see what those really do.. basically
> I've read and now I'm playing..
>
> Here is the orb Script:
> sphere {
> 0, 2
> texture {
> pigment { RedClear } //For now, will be glass later
> finish { F_Glass5 }
> }
> interior { ior 1.76 }
> translate y*1
> photons {
> target
> reflection on
> refraction on
> collect off
> }
> }
>
> Basic stuff really.. If you want I can mail you the "Test" photo..
> "Harold Baize" <bai### [at] itsaucsfedu> wrote in message
> news:3ce424ba$1@news.povray.org...
> > Not that I know much about these things, but I'm
> > doing something similar right now (see Old paperweights
> > in p.b.i).
> >
> > What is your sphere's radius? The light is slightly above
> > and to the right of origin. What photon effects are you
> > expecting and where? Not sure what is or isn't
> > working. Maybe you can post most of the script so we
> > can check it out.
> >
> > Harold
> >
> > "Dave Bates" <dab### [at] msncom> wrote in message
> > news:3ce41148$1@news.povray.org...
> > > Hello everyone,
> > > I've been working with Photons, IOR values and lights.
> > >
> > > I have an adaptive light that is set to a location of <2, .5, 0>
> > >
> > > I want this to look through a sphere I have sitting at Origin, but
> the
> > > light seems to point Straight down..
> > > do I have to use parallel lights to get this to work, or spot
> lights?
> > >
> > > Thanks
> > > D
> > >
> > >
> > >
> > >
> >
> >
>
>
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global_settings {
photons {
spacing 0.05
autostop 0
jitter 0
}
}
Don't have a count.. yet..
"Alastair Murray" <ala### [at] hotmailcom> wrote in message
news:3ce42cac$1@news.povray.org...
> Do you have a line like:
> global_settings { photons { count 50000 } }
>
> There are other ways of doing it, and obviously the count value needs to
be
> adjusted to suit. But you need something in the global_settings to turn
> photons on.
>
>
> "Dave Bates" <dab### [at] msncom> wrote in message
> news:3ce4297d$1@news.povray.org...
> > Thanks for the response Harold.
> >
> > I did see your Image, and it was amazing..
> > Basically I'm trying to Understand Photons, IOR and such... I want to
get
> a
> > light to shine through the Glass Orb I made, and Refract on the the
Plane
> to
> > the other side..
> > I have turned on photons, so I could see what those really do..
basically
> > I've read and now I'm playing..
> >
> > Here is the orb Script:
> > sphere {
> > 0, 2
> > texture {
> > pigment { RedClear } //For now, will be glass later
> > finish { F_Glass5 }
> > }
> > interior { ior 1.76 }
> > translate y*1
> > photons {
> > target
> > reflection on
> > refraction on
> > collect off
> > }
> > }
> >
> > Basic stuff really.. If you want I can mail you the "Test" photo..
> > "Harold Baize" <bai### [at] itsaucsfedu> wrote in message
> > news:3ce424ba$1@news.povray.org...
> > > Not that I know much about these things, but I'm
> > > doing something similar right now (see Old paperweights
> > > in p.b.i).
> > >
> > > What is your sphere's radius? The light is slightly above
> > > and to the right of origin. What photon effects are you
> > > expecting and where? Not sure what is or isn't
> > > working. Maybe you can post most of the script so we
> > > can check it out.
> > >
> > > Harold
> > >
> > > "Dave Bates" <dab### [at] msncom> wrote in message
> > > news:3ce41148$1@news.povray.org...
> > > > Hello everyone,
> > > > I've been working with Photons, IOR values and lights.
> > > >
> > > > I have an adaptive light that is set to a location of <2, .5, 0>
> > > >
> > > > I want this to look through a sphere I have sitting at Origin,
but
> > the
> > > > light seems to point Straight down..
> > > > do I have to use parallel lights to get this to work, or spot
> > lights?
> > > >
> > > > Thanks
> > > > D
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
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Check on the following I tried with your sphere:
global_settings {
photons {
spacing 0.02
}
}
camera {
location <0,2,-6>
look_at 0
}
plane {y,-2 pigment {rgb 1}}
sphere {
0, 2
texture {
pigment { color red 1 filter 1 }
finish { ambient 0 diffuse 0
reflection {0.1,0.3 fresnel}
}
}
interior { ior 1.76 }
translate y
photons {
target
reflection on
refraction on
collect on
}
}
light_source {0,1.5
area_light -<1,0,2>,<1,0,2>,4,6
adaptive 1 jitter
translate <3,2,0>/3
photons {
reflection on
refraction on
area_light
}
}
I replied to povray.newusers before finding you also posted here, asking
whether this involved area_light.
bob h
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Wow.. that's pretty cool..
I think Pretty much get Photons now.. but my question is.. is it better to
use the spacing or to use the count..
I used count in a new version I did.. and it looks good.. but my next
question is.. Does that limit the photon effect..
"bob h" <omn### [at] charternet> wrote in message
news:3ce51d82@news.povray.org...
> Check on the following I tried with your sphere:
>
>
> global_settings {
> photons {
> spacing 0.02
> }
> }
>
> camera {
> location <0,2,-6>
> look_at 0
> }
>
> plane {y,-2 pigment {rgb 1}}
>
> sphere {
> 0, 2
> texture {
> pigment { color red 1 filter 1 }
> finish { ambient 0 diffuse 0
> reflection {0.1,0.3 fresnel}
> }
> }
> interior { ior 1.76 }
> translate y
> photons {
> target
> reflection on
> refraction on
> collect on
> }
> }
>
> light_source {0,1.5
> area_light -<1,0,2>,<1,0,2>,4,6
> adaptive 1 jitter
> translate <3,2,0>/3
> photons {
> reflection on
> refraction on
> area_light
> }
> }
>
> I replied to povray.newusers before finding you also posted here, asking
> whether this involved area_light.
>
> bob h
>
>
>
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"Dave Bates" <dab### [at] msncom> wrote...
> Wow.. that's pretty cool..
>
> I think Pretty much get Photons now.. but my question is.. is it better to
> use the spacing or to use the count..
> I used count in a new version I did.. and it looks good.. but my next
> question is.. Does that limit the photon effect..
"count" is an easy way to have POV estimate the spacing for you. For most
users, "count" will work great. However, we kept "spacing" because it
provides a bit more control for the power users.
-Nathan
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