6Apr/090
GIMP corner shadows
To achieve that "bent paper shadow" look, follow this short tutorial.
Make a new image with white background, size 600x600px
Make two transparent layers
Make a 400x400px square at position x=100 y=100 (ie. centered)
Save selection to path
At "New Layer" fill that selection with black, on "New Layer#1" with white
Deselect
Select "New Layer"
Motion Blur, Zoom, Blur Center x=300 y=300, Length 10
Lens distortion, Edge -30, Zoom -5
Gaussian blur 5px to 7px
Selection from path
Rounded rectangle Radius 100%
Grow 20px
Feather 40px
Delete
Selection from path
Delete
Opacity 50%
Voila!