Re: Possible New Bug With HDRI?...Please Help... 2004-04-20 - By ccoles_avengers
Back
Thanks, Todd. This HDRI Legend really helps. Thanks for taking the
time to do it. If you don't mind, I'd like to add it to the Vizualds
Tips section as well.
BTW, I noticed in hacking around with the distant light (a light I
rarely use), I am not successful in getting soft shadows to work, even
though I have both "cast shadows" and "soft shadows" enabled (that's
why I always default to spot lights in most of my scenes). Is this
true? If so, I wonder why Eovia has this setting still accessible for
this particular lighting instrument...possibly a fix for CS4?
Cheers.
Claudia
"Selocic"
(a newbie)
--- In Carrara@(protected), cdavis@(protected) wrote:
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> Claudia,
>
> I rendered your file a few times to experiment. Yes, I will at times use
> additional lights with GI renders including Skylight. I didn't have the
> same HDRI map that you uploaded and I can't receive zip files so I
used the
> Dosch skies HDRI for this test. I usually do quite a few test
renders with
> different HDRI maps to get better lighting, plus if you are doing
animation
> and you will see you model from all sides, sometimes there are dark
area's
> that need to be addressed with an additional light.
>
> I uploaded a file showing the results.
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> http://groups.yahoo.com/group/Carrara/files/HDRI%20examples.jpg
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> Todd
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> Claudia,
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> I have almost always had to back up HDRI illumination with a key and a
> fill light, and not just in Carrara. The movies have spoiled us, our
> concept of natural light is skewed.
>
> Yours,
> David
>
> On Tuesday, April 20, 2004, at 01:33 PM, ccoles_avengers wrote:
>
> > Hello Holly,
> >
> > After I sent this message I hacked around for quite a while with the
> > file (it was *really* late at that point) and noticed that the GI was
> > turned off. So that was one of the main problems I was running into
> > [I hate when that happens]. So I apologize for the alarm, but thanks
> > for the response and tip about the ambient light because I didn't know
> > about that at all.
> >
> > However, could you please tell me if I am on the right track with
> > this; I think I am finding out why things that were "shiny" under
> > conventional light appear "dull" under HDRI. When I use spot lights,
> > I use a combination of shininess and highlights to set the specular
> > highlight of an object. I do this to communicate the type of
> > smoothness that the surface of the object has. However, I am noticing
> > that this characteristics disappears when I use HDRI. In order to get
> > close to what I had before (that is to show a "shiny" or smooth
> > characteristic of an object), it seems that I have to set a little bit
> > of relection in the texture in order to bring this out when using an
> > "overcast" type HDRI map. Is this notion correct or should I still be
> > able to get specular highlights with an overcast HDRI map? Also, if I
> > were to use an HDRI map that would contain direct sunlight
> > information, would the shininess and highlight be visible like it was
> > under the spot light, without using reflection?
> >
> > Thanks again for your help.
> >
> > Claudia
> > "Selocic"
> > (a newbie)
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