Take the Pen Tool (P) to represent one more layer of the tree, colored with #036803, placing this layer lower than the previous layer (on the layers’ panel).



Apply the next parameters for the last layer: Blending mode-Luminosity

 



Using the same tool, make another layer of the Christmas tree:



The layer’s parameters: Blending Options>Gradient Overlay



Gradient’s parameters:

 

 



Apply the Pen Tool (P) to draw the next layer of the tree, colored with #036803. Place this layer lower than the previous one too.



The next parameters should be used for the last layer: Blending mode-Luminosity



Using the earlier described method, we can represent the next layer of white color. The correction’s instrument is Convert Point Tool, as usually.



The layer’s parameters: Blending Options>Drop Shadow