Create a Selective Color adjustment layer and change the Reds, Cyans, Blues and Magentas values:
Save as a jpg file for the next steps and name it “sky” or whatever you want.
Create a new 3000×2055 px document in Photoshop and fill it with white. Drag the sky image into the white canvas using the Move Tool (V) and place it in the upper of the canvas. Convert this layer to a Smart Object.
Duplicate this layer and flip it vertically (Edit > Transform > Flip Vertical) and move it down to the lower section of the white canvas. Use the Free Transform Tool (Ctrl+T) to enlarge the bottom of this part to fit the perspective of the lake.
Go to Filter > Blur > Gaussian Blur and set the radius to 6 px:
Apply a Motion Blur wit the following settings to make the sky refection blurred and appear like a lake.
Create a Color Fill layer above the lake one and set it as Clipping Mask and pick the color #c66dbf. Lower the opacity of this layer to 20%.
Make a new layer and use the Rectangular Marquee Tool (M) to grab a selection on the horizon between the sky and lake. Set the feather radius to 3 px and fill this selection with the color #687197 and change the layer mode to Color Burn 100%.
Add a mask to this layer and use a small soft black brush to erase this part, especially the middle and both sides until you get a similar result like below:
Create a new layer and use a brush with the color #ca5d89 to paint along the line in the horizon. Use a layer mask to erase most of this line, leaving the effect visible subtly on the both sides.
On a new layer, use a soft brush with the color #687197 , the opacity about 15-20% to paint around the left horizon. Change this layer mode to Color Burn 100% and use a layer mask to reduce the effect on the middle, leaving the color effect visible on the edge only.
Add a new layer and use the Elliptical Marquee Tool to make a circle onto the area with the bright small clouds and set the feather radius to 3. Fill this selection with the color #f9edad and add a mask to this layer. Use a layer mask to reduce the sun’s visibility , making it appear behind the clouds.
Make a new layer, use a hard brush with the color #f9edad to paint some lines on the sun area. Change this layer mode to Soft Light 100% and apply a Motion Blur filterwith the following settings:
Add a mask to this layer to reduce the sun’visibility.
Create a new layer below the sun ones and use the same brush to paint the sun’s reflection on the lake. Change this layer mode to Overlay 70%.
Make a Color Balance adjustment layer on top of the layers and change the Midones and Highlights values. On this layer mask, paint around the edges to erase or reduce the effect, leaving it visible mostly around the sun.
Create a Curves adjustment layer to darken the scene. On the layer mask, paint around the sun to keep the light there.
Make another Curves adjustment layer to increase the contrast of the whole scene.
Add a Selective Color adjustment layer and change the Cyans and Blues settings: