The box is from David Brinnen, the Toon-Bot Chompers from DAZ 3D. This is an experiment of RTR/RNL (Ready-to-Render/Rendering with Natural Light). The self-made HDRI provides the light, shadows and backdrop. Pure Bryce 7.1 render combining TA and IBL, renders in 38 minutes (IBL Quality 128, 20% soft IBL Shadows, Premium 36 rays per pixel). See David's video at https://www.youtube.com/watch?v=0ASbkuNq4LA though I departed from it for the final render.