Motion blur tutorial : zooming effect

Hello, as I have been asked for a motion blur tutorial, here it is with GIMP :

 

Step 1 : select the area that you dont need to process

step 2: invert the selection

Step 3 : blur the border of the selection (20 pixels in this case)

Step 4 : go in the motion blur filter

Step 5 : select Zoom and the correct length (16 in this case)

Step 6 : The result

 

You can click on the image to watch it with a bigger resolution.

 

I hope that it can help few people here.

Done