Absorbtion with diamond material?

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DayVids
Licensed Customer
Posts: 350
Joined: Tue May 11, 2010 2:35 am

Hey guys, does absorption help with the brilliance of diamonds? I can't seem to achieve realistic results ( maybe it's just my models but I've modeled them according to websites for high brilliance ).

Thanks.

Perhaps you could post an example with a diamond model from blendswap so that I can see if it makes any difference - if you have the time on your next sample image of course.
CPU - i7-950 3.06 Ghz, 24GB Ram, Win7 x64, 2 display monitors, GeForce GTX 580 3GB Classified. I'm glad to say I LOVE OCTANE!
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radiance
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We're releasing 2.5 with absorption very soon (tonight or tomorrow), so you can try for yourself...

Radiance
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ROUBAL
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Make sure that smooth is disabled, and use actual diamond cuts for realistic refractions inside the gemstone...
French Blender user - CPU : intel Quad QX9650 at 3GHz - 8GB of RAM - Windows 7 Pro 64 bits. Display GPU : GeForce GTX 480 (2 Samsung 2443BW-1920x1600 monitors). External GPUs : two EVGA GTX 580 3GB in a Cubix GPU-Xpander Pro 2. NVidia Driver : 368.22.
DayVids
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Joined: Tue May 11, 2010 2:35 am

ROUBAL wrote:Make sure that smooth is disabled, and use actual diamond cuts for realistic refractions inside the gemstone...
indeed I am doing just that, I'm looking forward to the 2.5 to try it out myself, thanks again for all the hard work you guys put into this thing. I wish you all the success your egos and wallets can allow. Great software to work with.
CPU - i7-950 3.06 Ghz, 24GB Ram, Win7 x64, 2 display monitors, GeForce GTX 580 3GB Classified. I'm glad to say I LOVE OCTANE!
DayVids
Licensed Customer
Posts: 350
Joined: Tue May 11, 2010 2:35 am

2 samples of Octane below:

Then compare to 2 samples found online of diamonds, it appears that even though my cuts follow the diagrams pretty much exactly, I'm hitting some kind of snag getting a diamond to look quite right, though it's getting pretty close.

I think we're going to have to see if I just need to tweak the lighting and the model at this point?

online examples:
http://www.mervisdiamond.com/skin/front ... iamond.jpg
http://list-of-birthstones.com/Pictures ... es%202.jpg
http://cdn.physorg.com/newman/gfx/news/2009/Diamond.gif

Cutting Diagram:
http://irwan.net/wp-content/uploads/200 ... -crown.jpg
Attachments
Beta249 - 250samples HDRI - Pathtracing Diamond - Live DB Diamond Material used.
Beta249 - 250samples HDRI - Pathtracing Diamond - Live DB Diamond Material used.
Beta250 - 250samples HDRI - Pathtracing Diamond - rate of absorbtion set to 1 - depth of absorbtion .01 - Live DB Diamond Material used.
Beta250 - 250samples HDRI - Pathtracing Diamond - rate of absorbtion set to 1 - depth of absorbtion .01 - Live DB Diamond Material used.
CPU - i7-950 3.06 Ghz, 24GB Ram, Win7 x64, 2 display monitors, GeForce GTX 580 3GB Classified. I'm glad to say I LOVE OCTANE!
DayVids
Licensed Customer
Posts: 350
Joined: Tue May 11, 2010 2:35 am

well, it would appear that technical perfection based on charts and percieved perfection are a little ways off.

I changed the model to be "imperfect" and achieved closer to the results I'm used to seeing.
Attachments
250 test1250s-newdesign.png
CPU - i7-950 3.06 Ghz, 24GB Ram, Win7 x64, 2 display monitors, GeForce GTX 580 3GB Classified. I'm glad to say I LOVE OCTANE!
DayVids
Licensed Customer
Posts: 350
Joined: Tue May 11, 2010 2:35 am

oh, and I also found out just now, that I was importing them at the wrong size too... but too bad, 1 foot wide diamonds would be pretty fantastic :)
CPU - i7-950 3.06 Ghz, 24GB Ram, Win7 x64, 2 display monitors, GeForce GTX 580 3GB Classified. I'm glad to say I LOVE OCTANE!
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Chris
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Location: Norway

The last test looks awsome.

Chris
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