Falling pieces of bricks and rocks, appearing from left top 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 chroma key special effects digital effects visual effects postproduction film editing movie making cgi compositing keying virtual set keying process digital compositing motion graphics vfx chroma keying flat surface stone material wreck broken destruction hitting splattering demolition debris mining dynamite overlay brick editing demolition debrie expolosion thrown