How do you add paper wrinkles in Photoshop?

You can add paper wrinkles in Photoshop using a combination of the Emboss filter and Gaussian Blur. Here's a step-by-step guide:

1. Apply the Emboss Filter: Go to Filter > Stylize > Emboss.
2. Set Emboss Filter Parameters: Set the Angle to 135 degrees, the Height to 6 pixels, and the Amount to 200%. These values may need adjustments depending on your document size and desired effect.
3. Apply Gaussian Blur: Go to Filter > Blur > Gaussian Blur.
4. Set Gaussian Blur Radius: Blur the image by 1.5 pixels. Adjust this value based on your desired level of wrinkle definition.
5. Add an Adjustment Layer (Optional): For more control, add an adjustment layer (like Levels or Curves) to fine-tune the contrast and appearance of the wrinkles.

This process simulates the shadows and highlights that create the illusion of wrinkles in the paper texture. Experiment with different settings in the Emboss and Gaussian Blur filters to achieve the desired effect.