Step 6

Open rock 2 image and isolate the rock and the ground from the background using your own method.  Convert this layer to a Smart Object and place the rock onto the right of the existing ground.

Add a mask to this layer and use a medium-hard black brush to remove the ground.

Step 7

Activate the Lasso Tool (L) to select the lower part on the left of the rock and go to Filter > Sharpen > Unsharp Mask and fill in the following settings:

Step 8

Create a Hue/Saturation adjustment layer (set as Clipping Mask)  and bring the Saturation values to -88.

Step 9

Make a Curves adjustment layer to reduce the lightness. On this layer mask, use a soft black brush to erase the dark effect on the contour of the part sharpened in the step 7.