Step 5 Let’s have our light source coming from the left of the canvas and add lighting effects accordingly. Go to the layer containing the man and Cmd/Ctrl + click on the layer thumbnail. Create a new layer and select Layer > Layer Mask > Reveal Selection. Change the blending mode to Overlay, then with a small soft brush, brush onto the left edges of the layer to simulate the light hitting him. Do the same to the right of him, but with the blending mode set to Normal and using a black brush.
Step 6 With light comes shadow, and getting the shadows right is what will blend the man in properly with the landscape. Cmd/Ctrl + click on the man layer, create a new layer underneath and fill it with black. Flip it vertically, then Cmd/Ctrl + click on the lower middle transform point and drag up and right. Now go to Filter > Blur > Gaussian Blur and enter a value of 1px.
Step 7 Next, change the blending mode of the shadow layer to Overlay, duplicate the layer and set the blending mode to Normal. Play with each layer’s opacity for a realistic look. Create another layer and, using a small soft brush, add some shadow around the man’s feet. Add a layer mask if you need to tweak it.