bbq: The flame or something.. I mean, charcoal glows in BBQ pits right? My friend said something about the camera being able to pick up radiation that's invisible to the naked eye or something like that..|||im not really sure about this.. but heres my scientific reasoning about it (hypothesizing only).. hehe.. if it happens with a digital camera.. i think that i would blame that stupid "automatic" adjustments that cause those purply or glow.. the auto contrast and brightness, and type of light source.. well, the auto contrast and brightness, when taking a picture with a strong light source such a bbq pit or fire or even the sun, will auto somewhat tweak the picture to a darker one and revealing that purply glow.. or if your digital camera has a type of light soure setting, this would filter out some collors.. such as, when set on "incandescent light" or that is bright yellow-to-orange, taking a picture on "incandescent lighted" rooms will reveal a normal picture. but when used on a "flourescent light", your picture will turn more into blue.. or when the light source is set in "sun", but taken in another light you'l get other collors in your picture.. -->tungsten (use on incandescent bulbs, headlights, floodlights,etc) this setting will filter out the yellow-to-orange collor on your picture, since these light sources immit lagre amount of yellow-to-orange color. -->flourescent (use on flourescent bulbs, compact bulbs, LED bulbs) -->sun (use outdoors even when its cloudy, as long as it is the main light source).. when used on other light sources, the picture might look greenish... (this lightsource function is nice to play with pictures, it will give you a pro-result picture when done right.. or can even get an artistic touch when used with other light sources not intended to) =) if it happens to a film type camera.. well im not really sure how will it happen.. but i think i'll have a purply glow coz its over exposed.. thats why digital cameraz have that auto light-contrast thingy.. of course, if you have those filters for your camera it might happen too.. in the end, i dont believe that you can take a picture of something thatz invisible to the naked eye with a camera.. especially UV or IR..1st the camera was not even entended to take pictures of UV or IR.. 2nd if it did, then it would be imposible to take a nice picture under the sun..