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How to make teeth whiter in Gimp

Let's learn a simple yet effective teeth whitening technique in free image editing program Gimp.

 
  Author: mat | Version: 2.6.11 | 27th April 2012 |  
 
 
1.
 

Open a picture where you want to make teeth more white.

 
 
2.
 

In the menu click Layer and choose New Layer...

Choose Transparency as a Layer Fill Type and click OK.

 
 
3.
 

Choose the Paintbrush Tool.

 
 
4.
 

Click the brush type button and choose Circle Fuzzy brush.


 
 
5.
 

Set the Scale of a brush so it covers about 1/3 of a tooth.

 
 
6.
 

Set the new layer Mode to Saturation.

 
 
7.
 

Now hold Ctrl key and use a mouse wheel to zoom in on the teeth.

 
 
8.
 

Now start painting the teeth to make them white ...

 
 
9.
 

... paint all of the teeth.

I still need to fix the dirty gray parts.

 
 
10.
 

Right click a layer ...

 
 
11.
 

... choose Merge Visible Layers...

 
 
12.
 

Click Merge.

 
 
13.
 

Choose the Clone Tool.

 
 
14.
 

Set the opacity to about 67, brush type should be Circle Fuzzy, and set a smaller scale than you did before.

 
 
15.
 

Now press and hold Ctrl key and click on a white spot of a tooth and release Ctrl key.

This way you select a source area of a clone brush.


 
 
16.
 

Now start painting over the gray areas.

You will probably need to change the clone source a couple of times the same way you did in the previous step and change the scale of a clone brush for better result.

 
 
17.
 

Done!

The end result depends on how much time you are willing to invest.

 
 
 
   
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