The AWARS (Actually, We Are Rocket Scientists) WebRing uses the Logos below. They have a transparent background so that they appear to be part of your page as opposed to just stuck on it. They have been rendered using a ray tracing program that is capable of calculating the colour of a pixel that is part background and part foreground. In this case, if you have a dark background and have a logo that was generated for a light background, there will be a light halo around it as follows . . .
Whereas, using the correct logo will get rid of this halo as follows . . .
There are three logos, one for dark backgrounds, one for medium backgrounds and one for light backgrounds.
If you want to join the AWARS International Water Rocket Group click one of these two links: http://www.h2orocket.com/topic/newsletter/email.html or http://www.osa.com.au/~cjh/rockets/list.html.
If you want to join the AWARS WebRing, click the logo on the Water Rocket Index