#Compositing BLOOD Tutorial #stock footage #how to do vfx #quick tip tutorial #how to #after effects #how to composite blood #after effects blood tutorial #blood tutorial #halloween #actionvfx #vfx #compositing #vfx tutorial #visual effects tutorial #4k stock footage #free vfx #after effects tutorial #gun stock footage #visual effects elements #vfx quick tips #how to after effects #gun effect after effects #after effects tutorial for beginners #4k action vfx