Mixed rock and brick pieces dropped from top left side of the screen and scattering on imaginary flat surface, green screen background, animation overlay for chroma key transparent blending option

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