a strap would make it look much more realistic. with anything ridgid bodied, if there is some type of soft body object in the scene it adds realism.

a strap would be perfect.

the last render looks nice.

i would like to see a bit darker of a shadow on it tho.

and more detail on the pickups, i dont see any metal whatever you call it on the pickups, conductors or whatever.

and maybe an electric cord comming out of the guitar, or unplugged beside the guitar all coiled up or just going out of the screen. that would also add some pa-zaz