The big difference here is that there's a bit of a shadow cast by the 'bot. Tell me if it works for you as a photo-real 'bot and we'll just say the 'bot changes textures and colors from shot-to-shot because of its cloaking device.
And some days I find just fantastic advice on the Internets on writing screenplays.
I know you've always wanted to know about the sock.
Here's more on nudity.