>>1486
>>1492
nah, a larger creature has a mass in proportion to the cube of its size, and an impact surface in proportion to the square
napkin calculation, based on a spherical giant, if he weights 4 ton and smashes on a 15' square, he takes more damage than a spherical ogre weighting 1 ton and smashing on a 10' square, because of the higher ratio of mass to surface on impact, at the same speed if falling from the same height
it's physically logical that a larger creature takes more HP damage than a smaller creature, this even happens irl when small children have a chance to survive falls that would kill an adult
>>1486
>TL;DR: A big and heavy enough creature would land in earth like we would water.
if it's hard and dense enough to plunge through its an impact crater, maybe, but that means this beast is high enough level and has enough HPs to shrug falling from orbit, that's not the general case of the critters you encounter in D&D
on a similar principle, in a homebrew system derived in small part from d&d I played decades ago, there were limits to the damage small pixies could recieve from trolls trying to play tree trunks baseball with them: it requires very little kinetic energy to accelerate a pixie to the speed of a tree trunk, because the momentum transfer is extremely small. This soaking effect disappears of course if the pixie can't be accelerated, because it got smashed gorily on a rock, for instance