Adobe Photoshop

Photoshop CC Long shadow

http://abduzeedo.com/dramatic-shadows-photoshop-cc

클리핑 마스크를 이용한 포트레이트 아트워크

http://petapixel.com/2014/11/17/using-clipping-masks-drop-shadows-turn-portrait-sculpturesque-image/

Collection of Useful and Free Photoshop Scripts

https://designmodo.com/free-photoshop-scripts/