Thrown pieces of bricks and rocks, falling from top left side of the screen and scattering on imaginary flat surface, green screen background, animation overlay for chroma key blending option

bricks rocks falling spreading stone scattering scattered bricks demolition explosion green screen animation bricks on green stones screen overlay debris scatter debris on green brick debris screen overlay video special effects visual effects postproduction film editing movie making compositing keying virtual set digital compositing chroma keying flat surface stone material wreck broken keying process destruction hitting splattering demolition debris dynamite overlay mining brick editing demolition debrie expolosion motion graphics digital effects cgi chroma key vfx