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Old 05-13-2006, 03:31 AM   #1
jeremybirn
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Lighting Challenge #4: Bottle Collection

This is an old challenge now, this thread is archived. If you scroll down to the Challenge #4 section of the downloads page, you'll see that the models can still be downloaded for your tests, and also that a gallery has been made of top entries. Feel free to browse this thread to see what others have posted, even though you can no longer post here. Models are available for download here:

http://www.3drender.com/challenges/

MIRROR
3DS
LWO
MB
OBJ


The challenge is just to download the files and show how well you can light and render the scene. You can use any software you want. It can be any location, lighting situation, time, mood, or style of image.



Most of the objects in the .obj file will need some subdivision (polygon smoothing) before you render. All shading and rendering techniques are fine. The rules are to have fun, make a cool rendering, and share how you did it afterwards. (If you want more detailed rules, see this thread .) Here's a screenshot of the scene:

Those bottles need your shaders and lights - can you help them?

-jeremy
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Last edited by jojo1975 : 04-05-2015 at 04:46 PM.
 
Old 05-13-2006, 05:44 AM   #2
SoLiTuDe
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WEEEEEEEEE!!! *pretends to get started
Sounds like fun! --gonna get started right after I play some games ..at least I'm honest

Edit: This is an outdoor scene then, right?
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Last edited by SoLiTuDe : 05-13-2006 at 05:51 AM.
 
Old 05-13-2006, 01:17 PM   #3
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I never knew there was lighting challenges in here...
I'll have a go at it and see how far i can go
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Old 05-13-2006, 01:35 PM   #4
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Thanks Jeremy, I will give it a try
 
Old 05-13-2006, 02:08 PM   #5
jeremybirn
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Quote:
Originally Posted by SoLiTuDe
Edit: This is an outdoor scene then, right?


That probably depends how you render it. If there's sunlight streaming in through the windows and bottles, or an outdoor view through the windows, then the bottles are indoors. If the view through the window looks into a building, or you can't see through the windows but the reflections are of an outdoor environment, then the bottles would be outdoors. I doubt everyone will agree on this, anyway.

-jeremy
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Old 05-13-2006, 03:06 PM   #6
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Quote:
Originally Posted by sapienz
I never knew there was lighting challenges in here...
I'll have a go at it and see how far i can go


Maybe if previous challenges were plugged in front page that would attract more people !
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Old 05-13-2006, 05:05 PM   #7
jeremybirn
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Quote:
Originally Posted by lazzhar
Maybe if previous challenges were plugged in front page that would attract more people !

Let's make that a goal for this one: if a lot of people post some terrific renders of the bottles, this thread could easily become front page material. I know I can count on you, Lazzhar, you've made great images for all the challenges so far. I'm going to do some renders with the scene myself; I haven't decided what yet but I'll be a participant some time this week.

-jeremy
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Old 05-13-2006, 05:35 PM   #8
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I'm struggling with the refractions of the bottles rather than the setup of lighs...
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Old 05-13-2006, 07:53 PM   #9
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sapienz...here is a list of some index refractions

Alcohol - 1.329
Crystal - 2.00
Emerald - 1.576
Glass - 1.51714
Glass, Albite - 1.4890
Glass, Crown -1.520
Glass, Crown, Zinc - 1.517
Glass, Flint, Dense - 1.66
Glass, Flint, Heaviest - 1.89
Glass, Flint, Heavy - 1.65548
Glass, Flint, Lanthanum - 1.80
Glass, Flint, Light - 1.58038
Glass, Flint, Medium - 1.62725
Ice - 1.309
Mercury - 1.62
Plastic - 1.460
Ruby - 1.760
Water (gas) - 1.000261
Water 100'C - 1.31819
Water 20'C - 1.33335
Water 35'C (Room temp) - 1.33157

I just copied it from a tutorial by leigh over in the texturing forums....if you want to look over the entire tutorial, it goes over quite a bit of transparencies and refractions, you can find it here. I hope that that may help give you some direction to head in....

Good luck with your scene.

-Brian
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Old 05-13-2006, 09:17 PM   #10
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Quote:
Originally Posted by sapienz
I'm struggling with the refractions of the bottles rather than the setup of lighs...

Also make sure you have enough trace depth! The number of refraction steps (in the shader, and in your render settings) needs to be at least 6 or 8 in a scene like this. It defaults to just 1 or 2 in most software, so fix it in the shader and render settings. For shadows, also check the number of steps or rays in the light, to make sure you can see the shadows through the refractive glass.

-jeremy
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Old 05-13-2006, 09:43 PM   #11
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Bottle Collection

I want to try a nighttime scene. I have lots to do, but still but wanted to play with lighting. I have been experimenting for a few hours now. Here is a test.






Next up I need to finish isolating and surfacing all the bottles. The isolation will take a bit of time since the bottles have thickness for the refraction.
 
Old 05-13-2006, 11:09 PM   #12
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Got a chance to spend a couple of hours on this today but unfortunately this is probably all that I am going to get done for the weekend, so I figured that I would post where I am at so far and see what sorts of comments people have on it....please feel free to critique away...it is far from finished, but a place to start at least....thanks again!

-Brian
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Last edited by meanlebh : 05-13-2006 at 11:16 PM.
 
Old 05-14-2006, 12:33 AM   #13
tedious
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Of course there's a Klein Bottle in the scene! Mr. Birn would have us all doing refraction through a physically impossible 1-sided surface!

Brian - Nice start, man! If there's a biggie issue to work on it's adding definition so you can see the forms of the transparent bottles where they all overlap near the center. luv how the different bottles are getting different materials.

I'm going to give this one a try! I just got Mr. Birn's new book in the mail, too, it seems like an ideal time to refresh everything I'm doing with lighting techniques.

tedious
 
Old 05-14-2006, 04:52 AM   #14
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bottles with transparencey



More experimentation. I have isolated the bottles as a group. I am trying to decide what I want to do with them.

My lighting has a blue cast to it, but I believe my background image is too saturated.

I need to try some colored glass on some of the bottles and deal with the background image.

Please comment or critique, I am learning.

Thanks,

Slatr
 
Old 05-14-2006, 04:54 AM   #15
meanlebh
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Alright, so I lied...I pulled myself back to the computer for a few more hours and made a few changes...I'm out of town tomorrow though and then it is back to work on monday, so I am not quite sure when I am going to get some more time to work on it, but I would love some feedback/suggestions for when I do some get more time, if people are willing...

Looking forward to seeing other entries in the next few days!

Thanks again.

-Brian
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