TaskSet:Torn paper / ripped paper effect
From AdaptableGIMP Wiki
Crop a piece of a newspaper article or image and let it look like torn/ripped and adds a drop shadow. Rip effect can be controlled by parameters.
| Commands |
|---|
 Add Alpha ChannelAdd Alpha Channel Rectangle SelectRectangle Select Distort (dialog)Distort (dialog) InvertInvert CutCut InvertInvert Drop Shadow (dialog)Drop Shadow (dialog) |
Contents |
Description
Example
Step 1 - Alpha channel
1. Add alpha channel To make the background transparent
Step 2 - Select
2. Select rectangle region The region you wnat to "rip".
Step 3 - Distort Selection
3. Distort edge of selection
Distort - From the help file:
This command has several options which allow to increase or reduce the deformation. It is not possible to foresee the result and you have to experiment.
A higher threshold shrinks the distorted selection. A lower threshold makes the selection bigger.If the active selection has a regular shape (e.g. rectangle or ellipse selection), this option controls if the new outline is more inside the original selection or more outside the original selection.
A higher “Spread” increases the deformation.
A higher “Granularity” increases the deformation.
A higher “Smooth” decreases the deformation.
Deactivating Smooth horizontally or Smooth vertically increases the deformation.
How to do it
Perhaps start with values: 127, 6, 3, 3 and try whats best for you. Best values mainly depend on the size of your selection and the effect you wish to get.
Step 4 - Invert Selection
4. Invert selection You select the not-ripepd part of the image.
Step 5 - Cut
5. Cut inverted selection Cut away the outer parts.
Step 6 - Invert Selection
6. Invert selection again, back to initial selection Turn back to initial selection
Step 7 - Shadow
7. Add drop shadow
Drop shadow - From the help file
Offset X, Offset Y - The layer containing the drop shadow will be moved horizontally by X pixels, vertically by Y pixels. So, X and Y offset determine where the shadow will be placed in relation to the image. High values make the imaginary source of light look like it's far away in horizontal or vertical direction, and low values will make it look closer to the image. The offsets may be negative, leading to a shadow on the left of the selection if offset X < 0, or above the selection if offset Y < 0.
If there's no active selection, you must have Allow resizing enabled to see any effect.
After creating the shadow, a Gaussian blur with the specified radius is applied to the shadow layer, resulting in the realistic appearance of the drop shadow. It may be necessary to enable Allow resizing, since blurring extends the shadow.
The shadow may have any color. Just click on the button, and select a color when the color selector pops up.
How to do it
Result
Thats it:
