Here are examples by Seltzer (click for larger):
As always, don't forget the rules:
1. The image you submit should be taken between the 17 September (when it was announced) and 1 October (until one of the moderators closes the the mini-contest).
2. Your post must include "Assignment: Costumes" (to show your permission to count it for the contest) and the date the picture was taken (to show that it is a valid entry).
3. EXIF data should be intact. It helps if you can include the main points (including camera, lens, date taken, ISO, shutter speed and aperture) in the text of your message.
4. Only one entry per member (if you can't restrain yourself until the end of the first week you can post two or three separate pictures but your entry should be in a separate post and the only marked with the text above).
5. Remember the cross-site image size limit (640px on the longest side).
6. If the image does not exist in post at the end of the contest, it is disqualified. If you modify anything on flickr and re-save the image then the link is broken and the message needs edited to link the picture again before it will be included in the contest.
For everyone, please do not repeat other people's photos by quoting them until the contest is over. If you want to comment on or discuss an entry you can use a link to it (or just delete the picture from the quoted text).
Next week's assignment (for which you can begin taking pictures now) is "Texture". The DPS blog has an interesting post on the "Five Elements of Composition". Read the one on "Texture". Texture can also be added in post processing to add interest to an otherwise ordinary shot. Explore the use of texture whether you find it in the subject you are shooting or adding it later.