November Photo Competition

[jak]

Hi all,

The November theme has been decided.

Theme: "Caustics".

So what is Caustics, I hear you say. Well, dictionary.com says:

"The enveloping surface formed by light rays reflecting or refracting from a curved surface, especially one with spherical aberration".

Examples (http://images.google.com/images?q=caustics&sourceid=opera&num=_i&ie=utf-8&oe=utf-8&sa=N&tab=wi)

Rules:
1. New pictures only. Only pictures taken during the month of the contest may be submitted.
2. Your submission must have exactly 1024 pixels for its longest dimension.
3. Only one (1) submission per participant. You may submit a new entry to replace your older one. Just let me know via email or PM.
4. Stay with the theme and submit tasteful work!!
5. When submitting your image, please use a subject of "Zgeek November Photo Contest" in the email. Submit to urbanjak at gmail dot com. In the body of the email, please include at least:
(a) your title for the pic
(b) your zgeek user name
6. Basic editing such as cropping, levels, white balance, colour correction, brightness are permitted.

Submission Date: December 1.

Prizes: Pirate has kindly offered the following rep prizes:
1st - 300 points
2nd - 200 points
3rd - 100 points

Please submit your entries to urbanjak at gmail dot com. I will reply by email to confirm your submission. If you don't hear from me, please send me a PM to make sure I got your entry.

All entries will be posted (for voting) a couple of days after entries close.

Good luck and post your thoughts/comments/questions here!

[Urban3300]

Thats not it at all.
The caustics are referred to as the refraction pattern formed by highly transparent objects such as a glass of fluids which have a certain degree of Total internal reflection, for example the light falling on a glass filled with wine will form some strange patterns of different colours and intensity which are referred to as light caustic. The computer method for Caustic calculation is also referred to as photon mapping. The photon lamp in Blender/Yafray is for this purpose only. I even posted a sample pic on the nomination thread to avoid confusion.

[dozer]

i forsee confusion with this month and a lack of entries, should be interesting.

[Urban3300]

Caustic and caustics are different things.

[Glompbot]

I've got a few ideas actually...

[Glompbot]

i forsee confusion with this month and a lack of entries, should be interesting.

I forsee lots of wine glassess in this one :P

http://fizyka.phys.put.poznan.pl/~pieransk/Physics%20Around%20Us/Physics%20around%20us.html
first row are pretty cool

http://grail.cs.washington.edu/projects/digital-matting/shadow-matting/images/caustics-input.jpg
i like this too.

[jak]

Thats not it at all.
The caustics are referred to as the refraction pattern formed by highly transparent objects such as a glass of fluids which have a certain degree of Total internal reflection, for example the light falling on a glass filled with wine will form some strange patterns of different colours and intensity which are referred to as light caustic. The computer method for Caustic calculation is also referred to as photon mapping. The photon lamp in Blender/Yafray is for this purpose only. I even posted a sample pic on the nomination thread to avoid confusion.

That'd be why I highlighted definition number 3. Did you read that bit? Not meaning to be rude, but its the exact same thing you said.

Besides, its up to the photographer to interpret the theme their own way.

[jak]

Caustic and caustics are different things.

I think you will find most dictionaries define caustic and caustics as one and the same. You yourself have use both caustics and caustic in your own definition.

Also, my example link seems to follow your preferred definition. :)

[jak]

i forsee confusion with this month and a lack of entries, should be interesting.

Personally, I would find a lack of entries disappointing. But I prefer to remain positive rather than assume the worst before the comp has even started.

[Urban3300]

I did read it but no corrosive chemicals etc were included in my nomination. I don't see any burning or melting in my sample picture. I think I was pretty exact in what I meant. I posted that definition in the earlier nomination threads too so it should be clear by now. No offense taken by the way.

[dozer]

Personally, I would find a lack of entries disappointing. But I prefer to remain positive rather than assume the worst before the comp has even started.

sorry that was my attemot at reverse encouragement, has been known to work on geekz.

i think its a good theme :)

[jak]

sorry that was my attemot at reverse encouragement, has been known to work on geekz.

i think its a good theme :)

Well, hope it works! :)

Full marks to dozer for entering just about every contest.

Urban: sorted out the definition for you. :)

[fenderbasher]

If I submit something and it isn't quite on theme, will y'all let me know (nicely :) )? I have an idea, but am not 100% sure if it falls into the definition (too many big words in that definition...)
kthxbye

[jak]

No worries ;)

[berserk]

any entries yet jak?
jI'm having trouble thinking of of anything more interesting than shining a torch through a glass

[jak]

any entries yet jak?
jI'm having trouble thinking of of anything more interesting than shining a torch through a glass

Just the one entry so far. But thats typical. I never get entries this early in the month (maybe one max). They usually start arriving in the last 7 days or so of the month.

Have a look at some examples (http://images.google.com/images?q=caustics&sourceid=opera&num=_i&ie=utf-8&oe=utf-8&sa=N&tab=wi) for inspiration!

[Hairyman]

Well this month is a bitch, Urban, you had better bring home the bacon on this one! :swear: :p

[jak]

** Urgent ** More entries required!

Come on people, you voted for it.

[asdfjkl]

If only the fucking sun would show itself in newcastle i could get my planned shot, but so far no luck, and not much time left to get film processed and scanned :-(

[jak]

I hear you. Its either been sunny and windy or overcast and calm. Aargh!

[Glompbot]

Couldn't come up with anything for this

I think I only voted for it to shut the person who kept nominating it up.

[dozer]

ill try to do something tonight, under lights sadly.

[muga]

I got nothing this month.. :(

[Gameboy]

sent one in, u there jak?

[jak]

Yeap. I'm working in a client's office during the day - so no net access. :)

[babarfloyd]

sent one in, u there jak?

I sent one in late last night, too. Hope you got it jak.