Masking Assignment
Use Picasa to upload your image to your ePortfolio album in Google+, then insert using Insert > Google+ > Photo.
You must also credit the original sources of your images.
Example
(credit: Nathan W)
Source Material
Camo: http://goo.gl/WVXAvG
Lava: http://goo.gl/ivHaLA
Swamp: http://goo.gl/Csx7ot
Mountains: http://goo.gl/WEO9C1
Field: http://goo.gl/8VPRUI
Sunset: http://goo.gl/lGDMnY