Here are some alien head concepts I made to practice my concept art skills. I eventually turned this into a full body alien concept which ended up into another tutorial.. lol

Tutorial Available Here:
https://www.artstation.com/deivcalviz/store/nLR9/alien-character-concept-art-developing-an-alien-tribe-using-zbrush-photoshop-and-procreate
http://cbr.sh/uypb6q
https://gum.co/YZhae

OTHER TUTORIALS AVAILABLE HERE: 
https://gumroad.com/deivcalviz 
https://cubebrush.co/deivcalviz 
Follow me on my other social channels below! 
_____________________________ 
INSTAGRAM: https://www.instagram.com/deivcalviz/ 
FB: https://www.facebook.com/DeivCalviz/ 
PORTFOLIO: http://www.deivcalviz.com