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dmonk
04-03-2002, 12:02 AM
Can any one help on a lighting setup I've tried final gathering and it's not quite right. And my global illumination try was pretty much crap.

This is the actual picture:

dmonk
04-03-2002, 12:06 AM
sorry heres the pic

dmonk
04-03-2002, 12:07 AM
I tried and environment map which helped but i wasn't satisfied. so this is just a plain render with nothing special exceptt a platinum shader on the metal part and a glass shader on the stones woth the refractive index turned up but you can't tell because I'm such an amateur.

Here's the CG ring

dmonk
04-03-2002, 12:22 AM
This is a low res fg render so you have an idea of what i was ending up with.

EdHarriss
04-03-2002, 12:55 AM
The first thing I would to is to add a reflection map. Look at the reflection in the ring. Looks to me like it's in a large white box that is missing a side or two. If you look really close, you can see the person taking the photograph. Find something like this, use it as a reflection map and you'll be %50 done. (It's the last %50 that's the hardest.) ;)

dmonk
04-03-2002, 02:02 AM
took your advice it's looks 100% better.
thank's.

any other suggestions?

I know still have some tweeaking to do.

Joel Hooks
04-03-2002, 02:54 AM
I would suggest buying Ed's Materials tape http://www.cgtalk.com/images/icons/icon11.gif http://www.cgtalk.com/images/icons/icon11.gif http://www.cgtalk.com/images/icons/icon11.gif http://www.cgtalk.com/images/icons/icon11.gif http://www.cgtalk.com/images/icons/icon11.gif http://www.cgtalk.com/images/icons/icon11.gif http://www.cgtalk.com/images/icons/icon11.gif

</smartass>

dmonk
04-03-2002, 03:07 AM
If I had the $$$$ I would. Me and some other students were gonna chip in and buy them together once we all had some money to spare. Being a broke college students you don't always have a few hundred bucks to spare.

But I understand that people are professionals and don't have time to answer everylittle question that's why my post isn't specifically directed to one person.

If people have a problem with me asking for suggestions please report me to the moderator and have me banded from the forum.

:annoyed:

Joel Hooks
04-03-2002, 03:32 AM
I was just kidding :)

Mr Harriss has never been shy about giving hints, I was just giving one that was in my capacity ^^


reflection "cards" might do the trick too. Neil Blevins goes into this on his site. while reflection maps will work, setting up a realistic reflection scheme like the photographers did for that picture would be the way to go. They carefully plan their reflections and lighting to bring out those accents in the image.


Here is Neil's Text. (http://www.neilblevins.com/cg_education/tut17/tut17.htm)

Sorry I made you sad. :(

dmonk
04-03-2002, 03:43 AM
I figured you were kidding.:D

Thanks for the suggestion the link was a big help.

dmonk
04-03-2002, 05:21 AM
I think it's pretty close now.

EdHarriss
04-03-2002, 05:50 AM
Try adding some (very little) color to your light and make the lights overall a little stronger. Turn your umbra down to zero if you have not already.

Hehe, lowdown... thanks for the plug. For a shot like this, I think that he'd benefit from the Lighting tape more than the Materials tape though.

Joel Hooks
04-03-2002, 07:23 AM
Ya, that real picture definitely has a warmer tone too it.

That looks really nice dman..

ed> Your tapes cover my favorite topics. After Cumbria set, I will have to follow my own advice :)

tuna
04-03-2002, 07:50 AM
you might also wanna try and replicate a photographing studio.. use some big badass arealights and grids with "constant" material on them, this will give you the reflections and proper softshadows. at the moment you are kinda doing this but they are too small, i can see the white squares....

Atyss
04-03-2002, 10:25 AM
When I have to build such beauty shots, I usually build a background in my scene, behind the camera.

I create constant white planes to be visible in the reflection, and behind I put some high contast images on planes (constant white materials too). The best images for this are interior images with few colors that you boost the contrast in Photoshop.

If you don't want the background to contribute to the lighting (because of the FG), put them far and scale them up.


Hope this helps
Salutations - Cheers
Bernard Lebel

dmonk
04-03-2002, 11:57 PM
added colored light and scaled up those grids I think it's an improvement.

thank you guy's for all the feed back. Sorry if you guy's are sick of my dumb ring.

macoy
04-04-2002, 04:35 PM
Originally posted by EdHarriss
Turn your umbra down to zero if you have not already.


Just wondering why turn umbra down to zero?

Lieven Standaert
04-04-2002, 06:04 PM
It seems to me the original photgrapher used more (indirect) backlight. I think he used strong diffused lights from behind, giving that light flood over the ring and at the same time get a good shape definition by the shadows you get under the ring... so diffuse, but not too diffuse.

Your metal-material still seems rather grey, no? Going strong though ;)

-L

EdHarriss
04-04-2002, 07:45 PM
Originally posted by macoy


Just wondering why turn umbra down to zero?

If there are no other lights, it will make the shadow cast by the light totally black. This will help anchor the object to the surface. The FG then will fade out the edges of that shadow and make it look more realistic.

dmonk
04-06-2002, 02:18 AM
Once agian thanks everyone for all the helpful suggestions. those tips will help so much on the project I'm currently working on.

I tried to make the shadows a bit more evident but I think this is the last you'll see of the ring ( by now your probably sick of it.)

Thanks guys.

P.S.

Senor Harriss when I get enough scratch your tapes are a must have.

meloncully
04-06-2002, 02:31 AM
is there a way to get rid of that grainy look? Because that takes away from the picture.

dmonk
04-06-2002, 02:43 AM
Yeah it's grainy because my setting for my area light I didn't turn up. I just rendered it to look at the shadows and lighting and I didn't want to wait he extra minute. But I could, just was lazy on this one.

meloncully
04-06-2002, 02:46 AM
cool, because once you get the grainyness gone i think it will look completely shibby!

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