[WIP] Walking into grass "animation(?)"

[Dusk Again]

<-- (made it into a gif)

Hey! So I'm trying to have some high grass tile but I can't find any tutorial here that shows how to make it look ok. Right now, I'm making it so it's depth is relative to the player's, but it's nowhere near organic.
If someone here knows how to fix this issue, I'd be quite thankful.

Also here's the original tile:

[rocifier]

Hmm, it's flashing parts of his body on and off, try making it a more subtle effect.