Today we are going to create a tilt-shift effect using layers,a mask and lens blur. Lens blur gives the effect of a narrower depth of field, so some areas of your image stay in focus, and other areas are blurred. Tilt-Shift Photography is a popular technique that uses a specially-constructed lens to create a very shallow depth of field. Recently, it’s been used for what’s called “miniature faking ” is an optical illusion as a result of using a tilt-shift lens that tricks your brain into thinking you’re looking at a scale model of the scene, and not the scene itself. Best effect you can get on aerial shots.
First we are going to duplicate our background layer (Ctrl+J) and create a new layer mask to it.
Make sure you have the Background set to white and the Foreground to black.With the layer mask selected click the Gradient Tool (G). Make sure you select the Reflected Gradient and the Foreground to Transparent preset. Drag a gradient on the picture. You’ll see the effect only on the layer mask for now.
Click on the layer thumbnail then go to Filter>Blur>Lens Blur.Make sure that the Source is set to Layer Mask. Then set the Radius to your desired value.
After the render is done you might want to bring back the focus to the parts of the buildings that shouldn’t be blurred because are in the same line. So here is how we do it. Select the Layer Mask and with the Paint Brush(B) we paint the parts we want to mask off.