Lighting Challenge #4: Bottle Collection

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Old 12 December 2006   #691
@Chris Cool work, can you render a bit bigger to see some details ? the caustics of the bottles are a good start and also the "engraving" on the bottle on the right. I would rather used a more blurred background to distract a less bit the viewer

cheers
jojo
 
Old 12 December 2006   #692
buggsy -

If you're worried the glass will look too thin, you could focus on making the bottles cast nice deeply colored shadows (unless you're planning to add caustics, then black shadows plus the colored caustics would work.) But then, as long as you like the refraction and reflections you're getting, don't be afraid to let the viewer see the light that gets filtered through one bottle then another then another when you're looking at glass bottles brightly backlit by a window.

-jeremy
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Jeremy Birn
Author, Digital Lighting & Rendering, 3rd Edition
 
Old 01 January 2007   #693
Caustics

how come when I add caustics the scene get really bright even though I put everything very low(The photon intensity is at 1 and it's still brighter than anything) plus the exponant is at 1.2 and the photons are at 1000. It won't give me a clean look at all. Is there anyway to fact a caustic? My refractions are fine. Just getting the caustic look in the bottles are hard. Any advice will help.
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Sincerely

Anthony J. Thomas
 
Old 01 January 2007   #694
My scene so far

So this is what I got so far. I really can't figure out how to get my bottles to give off caustics. I tried using caustics and was working the the settings all day but it always came out to bright, whether the settings were Low, Medium, Or High, it still came out bright.
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Sincerely

Anthony J. Thomas
 
Old 01 January 2007   #695
If the photons are too bright, turn the intensity down - no problem there, right?

You can leave the exponent at 2 for the most realistic results. If you use a directional light, then it won't diminish the initial brightness much to leave the exponent at 2.

Of course you can fake caustics and do the challenge just fine with colored raytraced shadows, but it could be useful to get comfortable using caustics properly...

-jeremy
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Jeremy Birn
Author, Digital Lighting & Rendering, 3rd Edition
 
Old 01 January 2007   #696
This is an old challenge now. This thread is being archived. If you scroll down to the Challenge #4 section of the downloads page, you'll see that the models can still be downloaded for your tests, and also that a gallery has been made of top entries.

-jeremy
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Jeremy Birn
Author, Digital Lighting & Rendering, 3rd Edition

Last edited by jeremybirn : 05 May 2009 at 05:48 AM.
 
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