Motion blur
March 10, 2014 Leave a comment
If you have seen my Marseille post, you may have noticed the picture below.
This is an easy effect I have seen being used more and more recently. I will try to show you how to achieve it. I believe it creates an ethereal look and works very well when dealing with some king of pattern. Feel free to download the picture and try it for yourself.
1. Straighten (optional): depending on the direction you want to give, you may need to straighten up first. I wanted to give a 90 degrees angle here so I had to straighten the window frames. To do this open in Photoshop, duplicate the layer, select the ruler tool either by picking it up in the Eyedropper tool group or clicking Shift+I until you get it. I did put my starting point at a window corner near the bottom and the end at an upward corner on the same column. The longer the distance, the more accurate you will be. Once done, go to Image -> Image Rotation -> Arbitrary. It will display the angle calculated. Just validate. Use the cropping tool on the result.
2. Selection: Use the rectangular Marquee tool (M) and select the zone you want to apply the effect to. I selected a zone that is about 1/3 of the picture and in the center. As I may want to redo this step in the future I will create a new layer with the selection. With the selection still active go to Layer->New Layer->Layer via Copy.
3. Motion blur: Duplicate the newly created layer and with the Magic Wand Tool select the empty space at the bottom by clicking anywhere in the empty space. With the Shift key pushed do the same thing on the top part. Then go to Select->Inverse to get your original Marquee tool selection. With the selection active go to Filter->Blur->Motion Blur. A box like the one below should appear.
Angle will give you the direction of the movement. Below are 3 different angles
As I want a downward direction here, I will use -90 degrees. Distance will impact the force of the effect. The lower the distance is , the more you keep the forms.
I used the -90 / 600 px setting. As I want to also have this effect upward I do another copy and apply the effect with 90 degrees and still 600 distance.
Move the layers up and down to your liking. You should get something like this.
4. Overlap : You can see that were the layer overlap you have some transition issues. To fix this I used a Polygonal Lasso (L) selection as follow
I select the upward layer and a use the Erase tool (E) on it. Once done I do the same with the downward layer.
5. Integration: The last step is to integrate your motion blur with the rest of the picture and do the adjustments you wish.
Here’s a creative use by someone way better than me:
By Sebastien Grobelny