Press Ctrl+T, right click on the bounding box, choose Distort. Now distort by the top right corner until you find it similar to the image.

Change the texture blending mode to Multiply. Reduce the Opacity to 70%. Clip this layer to the mountain. Repeat this process to texture the other mountains, just duplicate the texture and clip it to the appropriate layer. For the right most mountain I flipped the texture horizontally.

Step 21 : Texturing - Ground

Let’s apply texture to the ground. We will use the same process to texture the ground. Open the Texture 4 and desaturate it.

Drag and drop in to main file. Place it in the "Above ground" layer group at very top. This texture is a vertical one, rotate it 90 degrees in counter clock wise.

Press Ctrl+T and enlarge the texture until it covers all the ground while holding the Shift key. Then Clip it to the ground layer. Change layer blending mode to Multiply.

Now duplicate the above texture and apply it to the other ground layer. Simply press Ctrl+J to duplicate the texture layer and move it to "Below ground" layer group. Place it just above the ground layer. Reposition it to cover all the ground. Now we can clip this to the ground layer but since the ground layer has a Layer style applied clipping won't have any result. Instead Ctrl+Click on the Vector mask of the ground layer to load the selection. Now click back on the texture, while the selection is active click on the Add layer mask button at the bottom of the Layers palette. This creates the layer mask.

Our image so far.

Step 22 : Texturing - Plants

Open the Textre-5. Select a portion, desaturate it and increase the contrast using Levels. Use similar values used before.

Copy and paste the selected portion into main file. Place this layer in "Bushy Plant" group at the very top.

Mask out the area outside the plant shape using Layer mask. Load selection by clicking on the plants Vector mask, back on the texture clicking on Add layer mask button. Change the blending mode to Color Burn, set the opacity to 80%.

Texture the other plants as well using the same method. Use any of the textures or just duplicate and apply the previous texture.