Add Film Grain in Photoshop (3 Non‑Destructive Methods)
Film grain adds texture and character to your images. This tutorial shows three ways to create grain, all applied non-destructively on a neutral gray layer so the effect works across your entire layer stack and stays fully adjustable.

Step-by-step instructions
Create a non-destructive grain layer
Go to Layer → New → Layer; name it “Film Grain.”
Edit → Fill → 50% Gray → OK.
Set the layer’s blend mode to Overlay (use Soft Light for a subtler look).
Right-click the layer and choose Convert to Smart Object.
Method 1: Camera Raw Filter (most control)
Go to Filter → Camera Raw Filter.
Open Effects → Grain and adjust Amount, Size, and Roughness.
Click OK. Double-click “Camera Raw Filter” under the layer anytime to tweak.
Method 2: Add Noise (realistic color grain)
Go to Filter → Noise → Add Noise.
Set Amount (e.g., ~30%), Distribution: Gaussian; uncheck Monochromatic for color grain or check it for B&W.
Optional: Go to Filter → Blur → Gaussian Blur and add a slight blur to control perceived grain size.
Method 3: Artistic Film Grain (least flexible)
Go to Filter → Filter Gallery → Artistic → Film Grain.
Adjust Grain, Highlight Area, and Intensity; click OK.
Note: This method has fewer controls and is less commonly used.
Control strength and size
Lower the Film Grain layer’s Fill/Opacity to reduce intensity.
Scale the Film Grain layer (Edit → Free Transform) to make grain appear larger or smaller.
For a very strong look, switch blend mode to Hard Mix and reduce Fill to ~10–15%.