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Am 18.03.2011 21:43, schrieb Jim Holsenback:
> Well here's take 2, I think I've arrived at chocolate!
thats bunny, err, funny...
...but your lighting seems not to match your HDR map (I assume) as seen
in the reflections.
And I would prefer the chocolate color a bit lighter - sweet not
bitter-sweet - if you know what I mean ;)
-Ive
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On 03/18/2011 05:58 PM, Ive wrote:
> Am 18.03.2011 21:43, schrieb Jim Holsenback:
>
>> Well here's take 2, I think I've arrived at chocolate!
>
> thats bunny, err, funny...
> ...but your lighting seems not to match your HDR map (I assume) as seen
> in the reflections.
In the background are loft windows from a hdr light map, and I was
trying to simulate a physical light source ... a lamp on the table from
the inner room. Lighting is still a tough challenge for me :-(
>
> And I would prefer the chocolate color a bit lighter - sweet not
> bitter-sweet - if you know what I mean ;)
>
hey choc of any kind is ok by me, but I /do/ love a small piece of dark
choc at the bottom of a cup of coffee :-)
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Am 18.03.2011 22:23, schrieb Jim Holsenback:
> In the background are loft windows from a hdr light map, and I was
> trying to simulate a physical light source ... a lamp on the table from
> the inner room. Lighting is still a tough challenge for me :-(
>
Your scene gives the impression of an indoor daylight scene and so I
would expect the light coming from the windows being the main light
source - even if some desk lamp is turned on.
Meanwhile I do use HDR *images* rarely as they do always restrict my
freedom in choosing the lighting setup (otherwise things look faked) -
but I *do* always use HDR *lighting*.
E.g. you can put colored boxes with some high emission value into your
scene to get nice highlights within reflective materials.
One of the main rules is to decide what the key-light and what the
fill-lights should be. Playing around with the classical
"Hollywood-Three-Point-Lighting" is a good starting point:
http://www.3drender.com/light/3point.html
(by Pixars's Jeremy Birn himself)
but this is also no *cure all* and the same is true for HDR-image-based
lighting - well it all depends and I guess there is a reason that over
there - where the 'big boys' are playing - is even a challenge *just*
for lighting.
-Ive
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On 03/18/2011 07:07 PM, Ive wrote:
> Am 18.03.2011 22:23, schrieb Jim Holsenback:
>> In the background are loft windows from a hdr light map, and I was
>> trying to simulate a physical light source ... a lamp on the table from
>> the inner room. Lighting is still a tough challenge for me :-(
>>
> Your scene gives the impression of an indoor daylight scene and so I
> would expect the light coming from the windows being the main light
> source - even if some desk lamp is turned on.
> Meanwhile I do use HDR *images* rarely as they do always restrict my
> freedom in choosing the lighting setup (otherwise things look faked) -
> but I *do* always use HDR *lighting*.
> E.g. you can put colored boxes with some high emission value into your
> scene to get nice highlights within reflective materials.
> One of the main rules is to decide what the key-light and what the
> fill-lights should be. Playing around with the classical
> "Hollywood-Three-Point-Lighting" is a good starting point:
>
> http://www.3drender.com/light/3point.html
> (by Pixars's Jeremy Birn himself)
>
> but this is also no *cure all* and the same is true for HDR-image-based
> lighting - well it all depends and I guess there is a reason that over
> there - where the 'big boys' are playing - is even a challenge *just*
> for lighting.
>
> -Ive
>
hey ... thanks for the pointers and link to the 3 point lighting write
up. Still playing around with a 3 light rig that I can easily change
(based on camera position) and I'm seeing MUCH better results
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Am 20.03.2011 12:39, schrieb Jim Holsenback:
> hey ... thanks for the pointers and link to the 3 point lighting write
> up. Still playing around with a 3 light rig that I can easily change
> (based on camera position) and I'm seeing MUCH better results
Let us see what you have...
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On 03/20/2011 08:46 AM, clipka wrote:
> Am 20.03.2011 12:39, schrieb Jim Holsenback:
>
>> hey ... thanks for the pointers and link to the 3 point lighting write
>> up. Still playing around with a 3 light rig that I can easily change
>> (based on camera position) and I'm seeing MUCH better results
>
> Let us see what you have...
When I changed over to 3pt lighting rig the chocolate texture needed an
entirely different tune ... I was WAY too dark. Obviously previous
lighting was really hurting the subsurface effect. Now after change 5424
(and some light help) I'm more in the range for what I'd expect for
various other finish attribute (mainly diffuse) ... but the subsurface
pigment and translucency settings dialed in way more easier this time. I
/did/ have some greenish artifacts in the crevices that aren't there now
... 5424?? ... maybe more my lighting foo.
Anyway here's take 3
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Attachments:
Download 'treat.png' (445 KB)
Preview of image 'treat.png'
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Am 20.03.2011 13:27, schrieb Jim Holsenback:
> pigment and translucency settings dialed in way more easier this time. I
> /did/ have some greenish artifacts in the crevices that aren't there now
> .... 5424?? ... maybe more my lighting foo.
Might well have been change #5424.
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On 03/20/2011 11:24 AM, clipka wrote:
> Am 20.03.2011 13:27, schrieb Jim Holsenback:
>> pigment and translucency settings dialed in way more easier this time. I
>> /did/ have some greenish artifacts in the crevices that aren't there now
>> .... 5424?? ... maybe more my lighting foo.
>
> Might well have been change #5424.
working on doc adds related to #5428 now ... ha-ha good thing a went
back and QA'ed myself as you /almost/ tripped me up with:
global_settings { subsurface { radiosity BOOL } }
AND
global_settings { radiosity { subsurface BOOL } }
at any rate will have that squared away shortly
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"Jim Holsenback" <jho### [at] povray org> schreef in bericht
news:4d85e786$1@news.povray.org...
> hey ... thanks for the pointers and link to the 3 point lighting write up.
> Still playing around with a 3 light rig that I can easily change (based on
> camera position) and I'm seeing MUCH better results
I seem to remember that Jaime has a 3 point lighting setup scene for
POV-Ray on his site.
Thomas
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> I seem to remember that Jaime has a 3 point lighting setup scene for
> POV-Ray on his site.
Not that I remember... perhaps my "studio kit" has some predefined
setup similar to the classic 3-point system, but it's surely not a great
example. I think you are remembering another example from someone
else. I seem to remember a great tutorial using an egg as subject, but
I can't remember right now who did it...
--
Jaime Vives Piqueres
La Persistencia de la Ignorancia
http://www.ignorancia.org
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