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tonyg3d
11-10-2002, 02:09 PM
Hi All,

This is my first post here, excuse me if this post is long-winded.
Firstly, thanks to everyone for some great ideas and tips. Very inspirational stuff!

Anyhow, I'm working on a job for someone and I would appreciate some comments on improving the realism of this work.

Someone told me the problems they had with 'photographing' coffee jars.
(Don't ask! Advertising work!)
The main problem being uncontrollable reflections which ruined the shots.
I said I'd have a go in 3d (Cinema4d) knowing I'd have more control over the reflections.

The label is lo-res at the moment, I just scanned it in. The scene contains a few lights, some with specular turned off. The reflections are actual objects in the scene. I also spilled out the coffee from the jar, took a digital shot of it and used it as a map for the coffee.

Unfortunetly, the glass refraction has created a kind of symmetry of the coffee which ruins its realism.

I look forward to your comments,

Tony.
tonyg3d
11-10-2002, 02:18 PM
Hi guys,

Wasn't sure how to post 2 pics at once, so heres another view.
The front on view will probably be the one used, but I think this one
shows off the reflections much more.

Tony.
CosmicBear
11-10-2002, 04:19 PM
nice work!
i can't see any symmetry in the coffee... hmmmmm :shrug:

will the object be in a real photo-background in the final version? in this case, you might want to add some reflections with different colors or some objects that are from this background...

the label in the first picture looks quite flat right now... maybe you can fake some 'paper-dimension' by adding a small white line to the top of the image... maybe one or two pixel wide. as it is not going to be animated, it should look like you are able to see the edge of the paper...

looking forward to see more...
DeathCarrot
11-10-2002, 05:04 PM
nice, nice, yeah i can see the symmetry, otherwise its very nice. you could smack a nice colourful environment on it.
amapimaster
11-10-2002, 08:43 PM
hi - nice work,

is the symmetry on the coffee definatly caused by the refraction in the glass? Or is it to do with the actual texture itself - maybe its just tiling bad?

Maybe you could do a test with another texture - say a checker board or something to get a good idea of whats happening. Have you tried rendering with no refraction in the glass - just to see what it looks like?

Good Luck!
creart
11-11-2002, 06:46 AM
Hi
it looks great, but could the pattern in the coffee have something to do with the way you mapped the texture? it looks like you used the 'seamless' option which very often gives this sort of 'kaleidoscope' patterns.
Maybe if you tweak your texture just a bit more and don't use seamless!...
tonyg3d
11-11-2002, 10:23 AM
Is it something I'm doing wrong but does refraction (glass) slow the renderer down to a crawl? I've created the glass outline with a thickness to simulate the thickness of the glass then added a refraction index of say 1.6.

Any ideas?

Tony.
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