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_____________
Kari Kivisalo
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Attachments:
Download 'room3.jpg' (25 KB)
Preview of image 'room3.jpg'
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>
Very realistic! This is very semblant to my own room, in dimensions,
and the light behaves similar to my lamp with a 10W compact flourescent
bulb (wich was insuficient for good reading, so I installed a 18w one).
As always, can we see the image without compression?
--
Jaime Vives Piqueres
La Persistencia de la Ignorancia
http://www.ignorancia.org/
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For a while, I suspected that commercial radiance engines have some
sort of built-in contrast/gamma/.. enhancement system, making POV-made
images look washed in comparison. Your current experiments demonstrates
that very well.
Fabien.
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"Jaime Vives Piqueres" <jai### [at] ignorancia org> wrote in message
news:3B7B70FD.E768066E@ignorancia.org...
> >
>
> Very realistic! This is very semblant to my own room, in dimensions,
> and the light behaves similar to my lamp with a 10W compact flourescent
> bulb (wich was insuficient for good reading, so I installed a 18w one).
Just got a new floor lamp and I put a 15W fluorescent (spiral design, and
both lamp/bulb from China as usual ;-)) bulb having a 890 Lumen output, just
enough light to see with but I certainly wouldn't want to read a book by it
alone.
I think I've been inspired now to try and render that myself now.
Is that some sort of heater inset into the wall?
Bob H.
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"Bob H." wrote:
>
> Is that some sort of heater inset into the wall?
I guess thats a typical design from 50's here. Everyting
painted over several times.
_____________
Kari Kivisalo
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Fabien Mosen wrote:
>
> For a while, I suspected that commercial radiance engines have some
> sort of built-in contrast/gamma/.. enhancement system
In theory could be done in megapov post_process with a selectable
compression factor.
I will make a page about how this picture was done. I try to
include a version where 48 bit output wouldn't be needed because
currently there is no way to get 48 bit pov files to PC version
of Photoshop. I have an "experimental" version of pov which can
write files for the buggy Photoshop.
Here is how the scene looks just gamma corrected.
http://www.pp.htv.fi/kkivisal/room3_nocomp_g22.jpg
_____________
Kari Kivisalo
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> I will make a page about how this picture was done.
Thank you!
> I have an "experimental" version of pov which can
> write files for the buggy Photoshop.
Might want to let the Team have a look at that...
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> In theory could be done in megapov post_process with a selectable
> compression factor.
Ideally, we could also have render-time filters, when the filtering
can be done on a pixel-by-pixel basis.
> I will make a page about how this picture was done. I try to
> include a version where 48 bit output wouldn't be needed because
> currently there is no way to get 48 bit pov files to PC version
> of Photoshop.
Would 24-bit depth create banding after compression ?
(if yes, that's one more reason to have a specific filter within
POV-Ray, acting when the color depth is still internally intact).
> I have an "experimental" version of pov which can
> write files for the buggy Photoshop.
:-))
Fabien.
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Fabien Mosen wrote:
>
> Ideally, we could also have render-time filters, when the filtering
> can be done on a pixel-by-pixel basis.
This would be good also because anti aliasing would work properly.
That room3 image was actually rendered with +am1 +r2 +a0.0 and
it didn't do much good. It's now clear that aa is best done on
final display (which is close to perceptually uniform space)
image because it's there for human vision. Doing aa on linear
image is just a waste of resources. So, I should have rendered
at 2x or 3x size without aa and resampled down as the final step.
> Would 24-bit depth create banding after compression ?
What I see and what I would expect to see in a reasonably realistic
image is quantisation noise. Banding maybe on perfecly flat surfaces.
This is how a 24 bit image looks after the process. The bright parts
are noise free.
http://www.pp.htv.fi/kkivisal/room3_24.png.
_____________
Kari Kivisalo
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Wow, realistic...
--
David Fontaine <dav### [at] faricynet> ICQ 55354965
My raytracing gallery: http://davidf.faricy.net/
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