Adobe Photoshop Tutorial: Infrared Photo Effect

Step 7: Add A New Layer Above The Channel Mixer Adjustment Layer

Click on the Channel Mixer adjustment layer in the Layers palette to select it, then use the keyboard shortcut Shift+Ctrl+N (Win) / Shift+Command+N (Mac) to bring up Photoshop's New Layer dialog box:

Name the new layer "grain" as I've done in the screenshot above, and then click OK. Photoshop will add a new blank layer named "grain" above the Channel Mixer in the Layers palette:

Step 8: Fill The "Grain" Layer With White

Press the letter D on your keyboard to reset Photoshop's foreground and background colors to their defaults of black and white, respectively. Then, with the "grain" layer selected in the Layers palette, use the keyboard shortcut Ctrl+Backspace (Win) / Command+Delete (Mac) to quickly fill this layer with solid white. The image in the document window will temporarily be hidden from view:

Step 9: Add Noise To This Layer

With the "grain" layer still selected, go up to the Filter menu at the top of the screen, select Noise, and then select Add Noise to bring up the "Add Noise" filter dialog box:

As circled in red above, set the Amount to 20%, set Distribution to Uniform, and make sure Monochromatic at the bottom is checked.

This adds our grain to the image, but problem is, we still can't see the image below the grain:

We'll fix that next.