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Poser - OFFICIAL F.A.Q (Last Updated: 2024 Dec 20 7:20 am)



Subject: How Light Probes are Laid Out


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mstudios ( ) posted Sat, 09 April 2005 at 1:13 PM

Nerd: You are right but you can use it as an Image Based Light image.....a nice bright contrasty image with lots of colour will work nicely....willadd the colours on the model...as if it were in the background.... As for Probes, you want a full HDR ( hi dynamic Range, not necessarily colour) ....my picture looks flat but has a full range 248. 235, 255 in the hi lites and almost 5, 7, 5 in the shadow end ~m


mstudios ( ) posted Sat, 09 April 2005 at 1:37 PM

file_214870.jpg

The background image ( a small jpeg) was used as the image in the IBL node on the main light in this picture. ..... why? 'cause I wanted the colour from the background to be globally introduced into the model..... ~m


nerd ( ) posted Sat, 09 April 2005 at 2:36 PM
Forum Moderator

Yeah, in my first expiriments with IBL that's what I was using. Just snap shots. That's what got me started trying to figure out how they were being handled. Here's a potential example If you wanted to use a square snapshot for an IBL source but the light source was way up in one corner you probably wouldn't get the intended results. The light in the corner would not get sampled. In a case like that a paint program that has a Polar Coordinate filter could be used to roll the image up in a ball. It wouldn't be exact, but at least the entire image gets sampled. Nerd3D


mstudios ( ) posted Sat, 09 April 2005 at 3:56 PM · edited Sat, 09 April 2005 at 3:57 PM

Attached Link: http://www.debevec.org/IBL2003/

I understand thoroughly Nerd3D::::

I went for using snapshots as well and now use 8mm lenses to shoot the backlight to the forground I use in my photo-composites. I then spherize them more to make them ( 180?) in Photoshop after reading Paul Debeve's articles ( see url above)

Thanx for all the information. The guys here are really good about sharing and I'd like to do the same....

~m

Message edited on: 04/09/2005 15:57


byAnton ( ) posted Sun, 01 May 2005 at 3:03 PM

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-Anton, creator of Apollo Maximus
"Conviction without truth is denial; Denial in the face of truth is concealment."


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TrekkieGrrrl ( ) posted Mon, 14 November 2005 at 5:12 PM

Interesting. Very interesting!

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Acadia ( ) posted Thu, 26 January 2006 at 10:25 PM

Upsy for the light challenged among us, LOL

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi



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