Yep title says it all

nuthug

Pretty sure it was Nuthug.

Nuthug is the originator but oblivion also had a big part in realism.

nuthug
but im pretty sure he stole the idea from thiggist

i worked with nuthug

so twiggist = thiggist? But even so nuthug got all the credit for creating it.
and there is the theory that :
Oblivion = NutHug
if that is true then Oblivion created it xD

nonono, Qblivion=nuthug

Why did he create an alt on a slightly off-topic subject?

i think Oblivion told the story about realism in one of Larfen's livestream once,
if i remember correctly Nuthug and Nightin were the first two who thought about all the realism things.