help with a semi transparent gem

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Inlite
Posts: 4
Joined: Thu Apr 16, 2009 10:35 pm

help with a semi transparent gem

Post by Inlite » Fri Apr 24, 2009 8:01 pm

ok, ive bugged Smartden about this problem and he even fixed a file for me (it worked perfect) and i thought i had it sorted.....

it seems i dont, so i thought instead of bugging the poor guy again id ask around.
Im trying to render a simple gold ring with a gem in it and the gem keeps coming out black...

here are the screenshots:
Attachments
blendigo gem.jpg
here are the settings, i think i copied them correctly from the file Smartden fixed for me - but its not working now
blendigo gem.jpg (88.84 KiB) Viewed 1668 times
im1240558871.png
heres the render - could it be lighting? the normals are facing out, i checked
im1240558871.png (1.1 MiB) Viewed 1670 times

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SmartDen
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Joined: Fri Oct 13, 2006 10:58 pm
Location: Canary Islands
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Re: help with a semi transparent gem

Post by SmartDen » Fri Apr 24, 2009 8:11 pm

turn off SSS
Check normals, dude!

Image
Image

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Kram1032
Posts: 6649
Joined: Tue Jan 23, 2007 3:55 am
Location: Austria near Vienna

Re: help with a semi transparent gem

Post by Kram1032 » Sun Apr 26, 2009 12:21 am

I hope, smoothing is turned off?
And yes, turn off SSS... -except the gem shouldn't be clear...

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CTZn
Posts: 7240
Joined: Thu Nov 16, 2006 4:34 pm
Location: Paris, France

Re: help with a semi transparent gem

Post by CTZn » Sun Apr 26, 2009 1:53 am

Leave reinhard tonemapping alone, since the gem is the only light absorbing material in the sky (!) it has to be dark with reinhard tonemapping.

Also put the ring on some surface and use emitting ones for lighting.
obsolete asset

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Kram1032
Posts: 6649
Joined: Tue Jan 23, 2007 3:55 am
Location: Austria near Vienna

Re: help with a semi transparent gem

Post by Kram1032 » Sun Apr 26, 2009 4:02 am

well, actually...
don't forget the gold^^ it also absorps. If it didn't, it'd be a perfectly grey-white reflector (a perfect mirror) rather than a golden one... :P

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