Re: In case you were wondering: PS CS2 HDRI 2005-05-01 - By Andrew Turner
Back
Hey guys -
A few things to note here about HDR images -
First, you don't need multiple exposures at all, really, especially
from a 3D app. Photoshop CS2 can convert any image to an HDR image; the
catch, of course, it that you're not getting the "full benefit" of a
truly wide range of light.
Second, since you don't need multiple images, you can use a single 3d
render with good lighting and tweak it in Photoshop. For that matter,
you can create any image from scratch, or take a scan of a Polaroid
taken in a Poconos nightclub from the 1970s and beef that up... and
save as an HDR.
From what I understand, we basically have the need for HDR to
compensate for images with wide lighting differentiation where, for
example, you have bright backgrounds and dark foregrounds, or vice
versa; as demonstrated you could simply take one shot with the aperture
wide and another with the aperture tight (to properly expose different
lighting levels) and combine that, and this more closely mimics the
action of the human eye.
That said, there is still going to be greater value in carefully
orchestrated lighting environments for use in environments in which...
um.. you need... carefully orchestrated lighting ;)
Andrew
On May 1, 2005, at 7:40 PM, ccoles_avengers wrote:
Hi Mark,
Thanks, Mark for the feedback.
RE: multiple exposures for HDR; the only technique that I have found
to be successful using 3D rendered images to create an HDR map has
been through Terragen (<http://www.planetside.co.uk/terragen/>), where
the program actually has controls to change camera f-stops. The only
thing I noticed that was a challenge was that the program doesn't
compensate for the color of the sky (blue), so when I took the images
and put them together to create an HDR map, I always got a blue cast
on my images. So I worked around this temporarily by creating skies
with a full grey cloud cover, and was able to get a decent HDR image
that I could then use in Carrara.
Cheers.
Claudia
"Selocic"
- 3D: when 'Flat' just isn't good enough! -
--- In Carrara@(protected), "mrcracked" <mrcracked@(protected)> wrote:
> Actually Claudia. This upgrade is $20 cheaper than they have been in
> the past. The only problem I noticed with the upgrade is that it will
> not upgrade Photoshop CS2 from Creative Suite CS (which has Photoshop
> CS). I had to go and dig out my Photoshop 7 CD. They also changed the
> way you link layers which is kind of annoying and tends to force you
> to employ layer sets. Other than that on a dollar for dollar basis I
> think this is by far the bet Photoshop Upgrade.
>
> I am hoping someone can show us how to make multiple renders of a
> Carrara Scene with different exposures so we can make HDR images out
> of Carrara renders.
>
> Mark
> --- In Carrara@(protected), "ccoles_avengers" <ccoles_shado@(protected)>
> wrote:
>> Hey Andrew,
>>
>> These look good for just two pics. But one question, did you find
>> that this particular upgrade price was a little highter than the last
>> upgrade installment? Just curious.
>>
>> Thanks for the pics.
>>
>> Cheers.
>>
>> Claudia
>> "Selocic"
>> - 3D: when 'Flat' just isn't good enough! -
>>
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