I particularly enjoy this part of the card production.  This makes the card come alive.  Contrast and texture in the sketching add depth and authenticity to the drawing.

 

 

 

 

 

 

To get the accuracy of the shading, the original photo is my guide.

 

 

 

 

 

 

 

When all of the greater parts of the shading are done, I focus on the details.

photo credits: Deena Hall