Write also image 'benchmark.ppm' when -bench
Write also image 'benchmark.ppm' when -bench

Twinklebear/OSPRay,MengjiaoH/ospray,ospray/OSPRay,wilsonCernWq/ospray,ospray/OSPRay,favreau/OSPRay,Twinklebear/OSPRay,Twinklebear/OSPRay,MengjiaoH/ospray,wilsonCernWq/ospray,ospray/OSPRay,wilsonCernWq/ospray,MengjiaoH/ospray,favreau/OSPRay,Twinklebear/OSPRay,ospray/OSPRay,MengjiaoH/ospray,favreau/OSPRay,MengjiaoH/ospray,favreau/OSPRay