We will be making this today:

Another Example:

Another example:

PLUGINS NEEDED:
Outline Object
So, create a new canvas of your choice (preferably a bit larger than the image you want to "shatter"), and fill the background black

Then take the photo you want to "shatter" and put it on a new layer.

Then, this is where you make the shape of the "shards". Select your image randomly like this:

Then cut and paste in a new layer. Name it Shard 1, do this for all the shards you want to make, in this case, I will only make 2

OPTIONAL:
Select small portions of the picture and paste them on a new layer (this is the little "fragments" of glass you see) like so:

Then, use Layer - > Rotate/Zoom tool to turn your shards how ever you want.

Move the shards how ever you like....:

Then, use outline object on your "shards" two times like this:
Make sure to do this for ALL the shards

Then use the magic wand tool to select the outside of your "shard". Press control + i and copy the rotated shard. Then use the move selection tool.

This part is a little complicated, paste your copied shard on top of the original one, move it in the direction you rotated it in 1 pixel by pressing your arrow keys in the direction you rotate it(So, if i rotate the shard top right, i would press up and right), repeat it how ever many time you want (this is the thickness of the glass). The idea is like this tutorial, how you layer something to make it 3-D.

Then use outline object on it like earlier, then glow it with these settings:

Make sure to do that for ALL shards:

And you're basicly done!
You can also add a "shine" to it by using a gradient glow.
Result:

Comments and feedback welcome
EDIT: I used only one outline for the tutorial, which is why my result may be different than yours, if you do it like i said, you will have the glass effect of example #2 on top of this post.
Edited by Celestrial, 23 February 2011 - 09:19 PM.
































