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Learn how to use Photoshop to simulate natural film grain on digital photographs. This beginner Photoshop tutorial will show you how to add natural looking noise using a non-destructive process. If you use Photoshop CS3, you will also learn how to add this effect using Smart Filters.
Preview of Final Results
Natural Film Grain Photoshop Tutorial
Step 1: Open an image into Photoshop
To open an image, choose File> Open. Browse for the image file and click OK.
Step 2: Create a new layer
First, we're going to create a new layer for the film grain instead of working directly on the photo. By using a new layer, we're practicing what is called non-destructive editing. Non-destructive editing means that all effects are on their own seperate layers so that they can be edited or removed anytime without undoing a bunch of steps. To create a new layer, click on the "New Layer" icon in the layers pallet or go to Layer> New Layer. Rename the new layer from Layer 1 to Film Grain. To rename a layer, simply double-click on the layer name in the Layers pallet and edit.
Step 3: Fill the layer with 50% gray
We'll begin working on this layer by adding a 50% gray color. To do this, press Shift+Backspace or choose to Edit> Fill. Click on the Use drop down menu, select 50% gray and click OK. The Film Grain layer should now be filled with a 50% gray color.
Step 4: Set the blending mode to Overlay
Now change the blending mode of the current layer to Overlay. You should now see the layer below in the document window. Many of the blending modes including Overlay will treat a neutral 50% gray as a transparent color. You can also use a 50% gray layer to add different filter effects without editing the original Background layer.
If you are using Photoshop CS3, you can use non-destructive Smart Filters by converting this layer into a Smart Object. To do this, right mouse click on the layer and select Convert to Smart Object or go to Layer> Smart Objects> Convert to Smart Object. The layer thumbnail should now have a small icon inside it to indicate that it is a smart object.
Step 5: Add noise
To add noise, choose Filter> Noise> Add Noise. In the Add Noise filter, set the amount to 400% and click OK. If you are working with a black-and-white image, checkmark Monochromatic to make the noise black-and-white. Don't worry about the amount of noise added; we will adjust this setting later.
Note: If you are working on a Smart Object with Photoshop CS3, the filter you apply will be smart which means that you can edit the settings anytime you want.
Step 6: Blur the noise
We added some noise, but it looks like digital noise instead of film noise. Fixing this is easy: just blur the noise. Choose Filter> Blur> Gaussian Blur. Adjust the radius to get the noise result you like and click OK.
Step 7: Adjust the intensity of the noise
The grain should appear to be very strong; perhaps too strong for most situations. To reduce the visibility of the film grain, simply reduce the opacity of the Film Grain layer. If you are using Photoshop CS3, you can double click on the Gaussian Blur Smart Filter and edit the settings if it is not what you want.