Here is a behind the scenes video for 300: RISE OF AN EMPIRE :
The VFX are made by :
MPC
Rhythm & Hues
Cinesite
Scanline VFX
The Third Floor
The Production VFX Supervisor is Richard Hollander
and the Post Production VFX Supervisor is John DJ Desjardin
© Vincent Frei – The Art of VFX – 2014