[SA Mod Q]How to delete alpha transparence within the skin's TXD files?

[IvanL]

So I have this GTA SA's characters' skin I want to swap into the game as cutscenes character model. 

It works fine when I display it as CJ's skin using skin selector or as in-game peds, but as soon as they appear in the cutscenes, they look like this: 

Skin display under GTA Anim Manager

As you can see, the "Disable Culling" checkbox is ON, if I uncheck it, it will become normal just like when they are peds, but in the game cutscenes the skin will still remaining full white or full dark and I want to fix it and just let the skin's texture display correctly. 

In another old post: "[Q] Problem with cutscene model..." people did mentioned that disable culling checkbox and some other stuff like cartoon shading effect, trans key, alpha transparency and something else. 

First thing: this has nothing to do with trans keys of game animations, it only fix character's noodly limb bones when it happens. So don't tell me that's the problem to pretend you know it well. 

Second thing: In the end of that old post, the op says he knows how to fix the issue. Except he did not say how to do it exactly. Also other who mentioned those terms above did not say anything more useful as well. So I have no clue about how to fix the skin's texture in my circumstance.

If anyone knows the way, please teach me. I will learn with humble. 

Edited May 31, 2021 by IvanL
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[IvanL]

Also here's the dff and txd files I want to use: 

DFF

TXD