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Bryce F.A.Q (Last Updated: 2024 Nov 12 7:03 am)
Subject: bryce specific refraction settings
Attached Link: Common Refractive Indexes
Bryce, for some reason, uses a common RI X 100. Thus an RI of 1.00 for air/vacuum becomes 100 in Bryce terms. Check the link for your basic numbers, then set the Bryce setting to 100x.Easy-peasy.
RosemaryR
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"This...this is magnificent!"
"Oh, yeah. Ooooo. Aaaaah. That's how it starts.
Then, later, there's ...running. And....screaming."
Quote - Bryce, for some reason, uses a common RI X 100.
Thus an RI of 1.00 for air/vacuum becomes 100 in Bryce terms.
Check the link for your basic numbers, then set the Bryce setting to 100x.Easy-peasy.
I never tumbled to this in all these years...LOL...thanx 4 the head's up R.. ...
Once
in a while I look around,
I see
a sound
and
try to write it down
Sometimes
they come out very soft
Tinkling light sound
The Sun comes up again
Have you read about the new materials (metamaterials) with a negative refractive index?
en.wikipedia.org/wiki/Metamaterial
These materials could be used to make cloaking devices or superlenses...
Unfortunately, it seems that Bryce does not accept negative values for the refractive index... it would be interesting to see what the renderer would do with these materials :-)
Ramon
Personally, I would like to see Bryce be able to handle double refractive materials....ruby/sapphire group being one of the best known. 'Twould make for some fine rendering!
RosemaryR
---------------------------
"This...this is magnificent!"
"Oh, yeah. Ooooo. Aaaaah. That's how it starts.
Then, later, there's ...running. And....screaming."
Yup~ You've got it.
Just be careful of the refraction settings provides in some of the presets....they can be off a touch.
For example, the standard 'diamond' setting under the 'Glass' library shows as 255, when it should be closer to 242 (common diamond RI = 2.417)
RosemaryR
---------------------------
"This...this is magnificent!"
"Oh, yeah. Ooooo. Aaaaah. That's how it starts.
Then, later, there's ...running. And....screaming."
Effectively, it will have no effect, if no light passes through the material at all. but translucent (ie. partially transparent) materials will use it.
If you look at the Material Editor's settings for various 'solid' materials, you'll see there is no effect whether the RI is at 0 or 300.....So save yourself some calculation time and give solid materials a zero setting.
RosemaryR
---------------------------
"This...this is magnificent!"
"Oh, yeah. Ooooo. Aaaaah. That's how it starts.
Then, later, there's ...running. And....screaming."
The Arch & Design shader in mental ray utilizes high refraction index values for surfaces that arent transparent, it produces the curve that controls the reflections intensity under different angles (similar ot the fresnel effect) but i havent yet figured out how to fake that in bryce yet either.
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Quote - Thanx rosemaryr. You have told me everything i needed to know.
??Everything??? Gosh, maybe I can figure out where that durn winning lottery ticket is then! grin
RosemaryR
---------------------------
"This...this is magnificent!"
"Oh, yeah. Ooooo. Aaaaah. That's how it starts.
Then, later, there's ...running. And....screaming."
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i have tried to google
for refraction settings. i only get general refraction values. is there somewhere i can find the settings that bryce uses?