Falling stone debris, tiny pieces of rocks falling from top of the screen bouncing of imaginary flat surface, green screen background, animation overlay for chroma key blending

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