Besides Instructables, One of my favorite websites is Photojojo.com (if you haven't heard of these super cool people you should pay them a visit.) A week or so ago they posted, http://content.photojojo.com/diy/diy-make-stained-glass-instagram-windows/ and I immediately wanted to recreate the awesomeness. This isn't an Istructable I take credit for, its more of I am picking up where Photojojo left off. The guide was more focused on the film aspect vs. the digital. I created a template you may use to create your own "photo stained glass." The best part of this DIY is that each sheet only cost me 2 bucks to print at my local Fedex Kincos! Printing enough to fill a window could cost less than a 20 dollar bill.
You will need Gimp Or Photoshop.
Step 1: Step 1
Download and open The Template. You will notice there is a folder with 20 sub folders. Each one has a number that coordinates with the template.
Step 2: Step 2
Drag a photo into your Template and place it. It will be a smart object, which means you can re-size it over and over with out losing quality.
Step 3: Step 3
Decide where you want your photo number wise and place it in the corresponding number folder. Each Photo has a layer mask so you don't have to worry about cropping before you drop it into the template. The only part will show is with in the numbered square. Go ahead and re-size your image. Don't worry if its not perfect because you can always go back and change it later without losing quality (if you placed it as a smart object.)
Step 4: Step 4
Repeat step 2 & 3 Until you have filled the entire canvas. You can move each photo around and re-size them until its perfect.