I suspect that photo might have been taken near the Aitape beachhead looking out to sea. I don’t think the limited amount of bombing and artillery fire unleashed on the north coast of New Guinea would much disturb the jungle. This is different than the central Pacific islands bombarded by battleships and certainly not comparable to the devastation around Stalingrad.
Oh, I see, having pulled up a map of New Guinea, that it is quite near the coast. That’s a different situation from inland terrain, particularly mountains.