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Scolopendra
02-22-2003, 05:47 AM
Does anybody ever rendered diamonds in LW?

My main problem, well, better say two problems are:

1. I can't get a real diamonds shine and
2. Diamonds in real life do not reflect their surroundings. I mean if they are put in some yellow gold it's dont add yellow reflection to diamonds. And in real life you can't see through them. But it is not what I have. If I'll change the color of the enviroment the color of the diamond will change accordingly.

Attached is a screenshot of what I've got with turned on caustics and radiosity. Diamond model consists of inner and outer non double sided polygons facing inwards and outwards. Outer polygons have 2.417 refraction index like it's said in LW manual and inner 1.0. All polygons are flat.

So, may be anybody have a solution to these problems?

feckit
02-22-2003, 05:59 AM
Umm..use a reflection map, and a BDRF shader for the bright highlights? Maybe turn on lens flare with no rings.

Edbittner
02-22-2003, 06:00 AM
D-load OGO_Hikari. There's a sample scene with a photo real diamond. Break apart and learn...
Ed

Scolopendra
02-23-2003, 04:22 PM
Ok, thanks, I'll try it.

riki
02-24-2003, 02:09 AM
Maybe you can find some useful info here http://www.3dlapidary.com/Home.htm

Scolopendra
02-24-2003, 04:49 PM
Guess, that info you provided, riki, might help. May be I'll show final result when I'm done reading this :) Thanks.

Mclaren
02-24-2003, 11:46 PM
This is the Diamond I made. It's rendered w/o HDRI and with only 1 light and Raytracing and Refraction. Also the diamond will look much more realistic if you turn down the Ray Recursion Limit, I used 6 on mine, and the default is around 16 I believe.

You can see the render here http://www.geocities.com/robertneamtiu/diamond.avi
[204kb - DivX -- Use SaveAs]

Also these are the surface settings I used.

Hervé
02-25-2003, 03:00 AM
you are talking in fact of the main problem in LW refelctions.... only additive.... ahhhhh.... get Hyper smooth from

evasion3D.com

Cheers

Lynx3d
02-25-2003, 12:28 PM
You can fake the color dispersion a bit, there is a tutorial about this in the very old "lightwave 3d (v. 5.6) applied " book, i ended up with on a quick try:

http://www.aspect-design.de/lynx/stuff/diamond.jpg

->Object File<- (http://www.aspect-design.de/lynx/stuff/diamond.lwo)

Scolopendra
02-26-2003, 04:59 PM
Wow! Thank you guys. I'll will try it for sure.

2 Mclaren:
2 Lynx3d:

Thanks for provided files, I'll try both methods. Actually I need it for some ring I've modeled. Don't want to show results while it is not completely ready.