Vanilla Heretic Questions

[INfront95]

Hi guys, for months i was dreaming to make something "Heretical" but on my journey to edit this game, i stumbled on many many quirks and roadblocks, wonder if some people with deep understanding of Heretic editing can lend me a hand.

My main roadblock right now is: I can't figure out how to edit anim textures and switches in vanilla. Can anyone explain me step by step how to change them? Is it even possible?
I am aiming on Dosbox\Chocolate source ports as basis.

[Uncle Death]

I havent tried editing Heretic, but given that its an Iwad you can use Slade and the process for changing textures is the same as it is for Doom.

Heres a very good tutorial