Sunlight only contains so much energy. Even if he’s managing to metabolise every bit with no loss, there’s not nearly enough light hitting him at any one moment for that to really make sense. If he’s always photosynthesising and his body storing it for later somehow… he’d put on a huge amount of weight in his non-Hulk form.
The gamma does turn him green. Maybe that’s not just stylistic, maybe he’s photosynthesizing.
Sunlight only contains so much energy. Even if he’s managing to metabolise every bit with no loss, there’s not nearly enough light hitting him at any one moment for that to really make sense. If he’s always photosynthesising and his body storing it for later somehow… he’d put on a huge amount of weight in his non-Hulk form.
Well, I mean, he is wearing those purple shorts. Maybe they’re… battery shorts.