Yes, Oku Hiroya experiments with CG in his manga a lot. You only just noticed, this far into the manga? 
🖤~Grim~💚
NB Aussie artist. they/them
IG: @grims_fantastical_artistry
I love anything horror when it comes to anime and manga. Junji Ito's work, Mononoke and Chi no Wadachi are a few of my favourites.