Add the left rock to the main scene. Make sure to position this left rock layer above the rock folder. Take the free transform tool. With the tool scale, its size to the one needed. We need to alter the perspective of this rock, to do this right-click on the document when the free transform tool still activated to show up free transform option. Choose perspective. Drag the anchor point to the direction shown in the screenshot to alter the perspective of the rock:

Duplicate the left rock layer and move the duplicate to the right side to place it in front of the rock created in the previous step 3. I named this duplicate right rock. Take the free transform tool and alter the shape of this right rock by warping it.

Step 5

In this step, we will add waterfalls to the scene. Open the waterfall image and cut out the part needed.

Add the waterfall to the main scene. Scale its size and place it between the right and left rock. Flip it horizontally and alter the perspective to have the one like this:

Here is what we should have so far….

We need to hide some unneeded parts of the waterfall layer. I think we know what to do to execute this purpose, don’t we? Yes…..! We use layer mask…! Give this waterfall layer a layer mask and mask parts unneeded as highlighted in red to hide them. Use a very soft round brush to mask them.

Here is the result I created after being masked.

Next, duplicate the waterfall layer and move the duplicate to the right a bit to have the result like the one below. Don’t be panic if you do not get the exact result like the one I created, you can compose your own waterfall composition as you prefer. It’s not a big deal, is it? So can we go on now?

Step 6

Ok, let’s go to the next process. Select the right rock layer again to be active on it. Give this layer a layer mask. Mask some areas where needed as highlighted in red. The main purpose of this masking is to blend the layer to the rock behind it. Use a very soft brush to do this. To alter the shape of the rock edges we can mask them as well, we should use chalk brush taken in the brush preset to this purpose.