Big scrim on C-stands! You

Big scrim on C-stands! You can buy eight-foot-square (or bigger) frames and diffusion material (expensive!), or you can make your own frame from PVC pipe and fittings (there are many tutorials on YouTube) and add professional diffusion material, or even a cotton bedsheet or semi-transparent shower curtain. Mount it between the sun and your talent on C-stands or light-stands — and be sure to sandbag the stands, because the big flat diffuser will act like a sail in the wind.