The final result:
Images used:
Create a new document in Photoshop. Insert an image of the sky.
Duplicate the sky layer. Apply auto-contrast to it by clicking Image> Adjustments> Auto Contrast (Image> Correction> Auto Contrast). Install Blending Mode (Overlay Mode) duplicate layer on Overlay, Opacity reduce to 45%.
Combine both layers with the sky and duplicate the resulting layer. Connect the layers to the sky along the edge, as in the image below. Merge the layers again with the sky.
To connect the edges of the sky, select the tool. Patch tool 
(Patch) and select the area that you want to restore, and then in the top toolbar, select Source. Drag the border of the selected area to the area from which you want to select a part of the image. When you release the mouse button, the initially selected area is filled with the selected pixels.
Repeat this step several times to cover the entire cloud boundary.
Next, apply for the sky layer Edit> Transform>Warp (Edit> Transform> Warp), to make it like the image below:
Scale the sky layer by clicking Edit> Transform> Scale (Edit> Transform> Scale), further turn it 10 ° to the left.
Insert images of landscapes:
Merge them together.
Remove the edges between two landscapes using Patch tool (Patch), as in the previous steps. Erase the sky areas. Add a Layer mask 
(Layer mask) and using black brush paint over parts of the sky. Adjust the horizon with a soft translucent brush.
Duplicate the landscape layer and apply to it. Edit>Transform>FlipHorizontal (Edit> Transform> Flip Horizontal). Attach the duplicated layer to the original one on the left side. Merge both layers together and join the edges with Patch tool (Patch), as in the steps earlier.
You should have something like this:
Navigate Edit> Transform>Warp (Edit> Transform> Warp):
After the transformation, turn the landscape layer slightly to the left.
Add a Layer mask (Layer mask) to the layer with the landscape and using a soft brush with Opacity 18% Walk around the horizon. You can remove excess parts with Patch tool (Patch).
Select Quick mask 
(Quick mask) and select a large soft brush and paint a spot like in the image below:
Click Quick mask (Quick mask) again. You will get a selection around the spot.
Without removing the selection go Image> Adjustments> Hue / Saturation (Image> Correction>Hue / saturation).
Correct Levels (Levels) with settings like below:
Duplicate the sky layer and place it above the landscape layer. Rotate the sky layer to create a mirror image. Being on a layer with a landscape go Select>LoadSelection (Select> Load selection). Go back to the sky layer, create Layer mask (Layer mask) and remove excess areas.
Change Banding Mode (Blend Mode) created layer on Overlay with Opacity 65%.
Create a new white layer over the original sky layer. Navigate Filter > Distort > LensesCorrection > SetVignette > Amount > Darken (- 40) (Filter> Distortion> Distortion Correction> Vignette> Effect> Dimming (-40)). Banding Mode (Blend Mode) change the created layer to Multiply (Multiply) with Opacity 85%.
Open the image with the lock.
Cut out the castle from the background.
Apply Edit> Transform>Warp (Edit> Transform> Warp), as in previous steps.
Decrease Opacity up to 90-88%. Create Layer mask (Layer mask) and brush the edges of the lock with a soft brush. (Opacity about 30%).
Upload a cloud image.
Go to Channels Palette (Channel Panel) and activate the red channel. Duplicate it.
Keep the red dubbed channel active. Navigate Image> Adjustments> Levels (Image> Correction> Levels). Move the left black marker and the white right marker to the center. Get a black and white contrast.
Load selections for this channel (move the cursor to the channel thumbnail, click Ctrl + Enter).
Go back to Channels Palette (Channel Panel) and activate the RGB channel. Select Layer mask (Layer mask) to separate the clouds from the background.
Navigate Edit> Transform> Scal (Edit> Transform> Scale) and move the cloud up.
Insert another cloud image and separate it from the background using the previous steps.
Place this cloud below the landscape layer.
Now create a rainbow. To do this, use the tool. Pen tool 
(Pen).
Adjust the brush: diameter – 2 pixels, dynamic shape, White color. Go back to Pen Tool (Pen) right click select Stroke Path> Brash (Stroke Path> Brush). Select Simulate Pressure.
Return to the RGB channel. Select Layer palette (Layers Palette) and click on Layer mask (Layer mask).
You should have a white rainbow.
Install Fill (Fill) 0% and apply Gradient Overlay (Overlay gradient).
Duplicate the rainbow layer and apply to it Filter>Blur> MotionBlur (Filter> Blur> Blur to Motion).
Duplicate the original rainbow layer again and apply again. Filter>Blur> MotionBlur (Filter> Blur> Blur to Motion), but with different settings:
Repeat this step a few more times:
To create another strip of rainbow duplicate all the layers applied to the rainbow, merge them. Apply Filter>Blur> GaussianBlur(Filter> Blur> Gaussian Blur) with a radius of 4% and Opacity 35%. In the final merge all the layers. Duplicate the resulting layer. Navigate Image> Adjustments> Equalize (Image> Correction>Align Brightness). Banding Mode (Blend Mode) change layer to Multiply (Multiply) with Opacity 20%.
Merge the layers again.
And here is the result!
Translator: Olga Mikhailova
