Christmas Cactus: Photo and drawing

http://www.shuttertalk.com/forums/im...ingplantSM.jpg

http://www.shuttertalk.com/forums/im...ascactusSM.jpg

Nice picture as we can easily judge that these picture is captured very nicely.As we can see the reflections of light on the different part of the cactus and these is the only thing which make your photo good but in your sketch these point lacks as it itself is a sketch so the effect of lights which should be coved by the colours is not done as a result it simply looks totally different from the captured photo.