In this week’s free Deke’s Techniques, Deke emulates an infrared photograph by applying the Channel Mixer. Then, of course, he applies it to some topiary elephants to create a snowy landscape. Because that’s the kind of thing Deke does: use Photoshop as his own personal weather machine.
This effect works particularly well on rich-green landscapes, because the primary ingredient here is turning the green channel up and then turning the red and blue channels down, in a way that compensates for potential clipping. You can get a better grasp on all this mysterious dekeMath in the video, so I’ll just point out that this:
Deke’s Techniques, exploring the evil genius power tools in Photoshop each week.