4. Add layer mask (filled with white color) to upper layer and then select Brush tool with black color. After that paint on the layer mask to delete edge between these two layers.
5. Select both layers and merge them (Right click on layers and select Merge layers) then Select Marquee tool (shortcut – M) and then mark sky and a bit of green field then press DEL key to delete sky. We need to achieve straight terrain.
If you are not satisfied after deleting the edge between layers use Clone stamp tool and (Spot) healing brush tool to camouflage transition between these layers.
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