question of a amateur in 3d

[bambanx]

Hi , fisrt sorry my english is bad :) , i have a questions i am a amateur in 3d i use only zbrush for simple object a this images the export to photoshop for begin my protect . but my problem whit this system is the lights, perspective and the atmosphere of the escene is not good , how could be my next step for learn , maya? who i can fix this , how i can join my 3d models and my pictures for better result ¨? you can say me the name of tecniques ? camera projection? camera mapping ?
thank for all