Nope this isn't about renewables....rather its a quick look at some of the chromakey work I have been doing recently. Chromakey or as it is more often known green screen (or blue screen depending on......you guessed it - the colour of the screen).
If you search around the web there are loads of tutorials on how to remove green fringes from chromakey shots. All that means is that there must be loads of people who are not lighting their green screens properly! As with all things photography related it is miles easier to get it right in the camera rather than have to fiddle with photoshop later.
So how do you avoid fringes or spillage when working with green screen or blue screen chromakey shots - easy - light the subject seperately from the screen. As by their nature the subjects in these shots will be used against a different background it is important that the lighting on them is flat and featureless so they can be slotted in in whatever scenario the designer has in mind.

The pic above is just one of many that I took for a government education project. For this shot (and the several hundred others that went with it) I used four lights - two to give a nice flat light on the green screen (it is much easier for the designer to cut out if it is all a nice even colour) and two for the subject. None of the pictures I took needed any re-touching or removal of fringes or backwash. So a DVD of the images could be given to the producer at the end of the shoot, saving them time and saving me Hassle!