Due to the burnt corpses of Uncle Owen and Aunt Beru, i always thought a laser blast would slowly incinerate a dead body from inside.
Since blasters have stun settings much like phasers in Star Trek, something a notch below disintegrate must also be present. (Vader cautions the bounty hunters in ESB not to disintegrate their quarry.) Unless that was disintegration? I’ve had the unpleasant theory Owen and Beru were executed after refusing to divulge where the droids were, in order to protect Luke. Their bodies were posed, and then burned after death to complete the impression the Tuskens did it.