A few days ago, I posted Gary Fong's video on how to warm up the background while having your subject look natural. I added a comment that by using the an amber gel, you should be able to go the other way, too. Sure enough, Gary's got a video for that, and here it is: [embedplusvideo height="580" width="580" editlink="http://bit.ly/1aEqVcW" standard="http://www.youtube.com/v/q44QIBTK3Ag?fs=1" vars="ytid=q44QIBTK3Ag&width=580&height=580&start=&stop=&rs=w&hd=0&autoplay=0&react=1&chapters=¬es=" id="ep2598" /]
This is an actual shoot at a wedding using only one speedlight on a stand. This shows the spectacular result you can get with a very simple lighting setup. For product information, please see http://www.garyfongestore.com
My only problem with this trick is that not just the sky goes blue. Notice that the white fence in the background also takes on a blue cast. While most people won't notice, a few will probably think subconsciously that something's just not right. Of course, with careful choice of background, this technique could be very useful.