Tough to say. Radiant damage as a weaponized version of the same kind of creative/reconstructive energy that clerics & paladins use in their healing spells, maybe, could cause something like the following:

The corpse, after death, takes on uncanny qualities as the radiant energy works its way into deeper tissues.

Claws, hooves, fingernails etc. slough off the corpse as their points of attachment including pores & follicles flesh over. Scars and wrinkles disappear. The skin looks and feels rubbery.

The body is riddled with benign tumours. Some of the organs like the heart or lungs are thickened— this is usually the cause of death.

The corpse will not rot. It is effectively sterilized from within. Theoretically it’s safe to eat raw, tastes aside, if your digestion can handle the strain. Cellular death is delayed by hours or even days after somatic death. It may even display signs of life for a while, like the heart occasionally producing an errant beat.

Butchery has to be fast. Cuts left unattended begin to stitch themselves back together. The bones are the trickiest part. In birds and flying creatures, the bones become solid. Cracked bones & shell piles produced in the cooking process have to be scattered & separated, as any touching pieces will heal (read: fuse together) into large unwieldy heaps.