What makes TextureOverride not working in some games?

[Romangelo]

It works for most games, but in some games it doesn't. I can make textures disappeared in Hunting Mode, but when I make it into an INI mod file with handling = skip, it doesn't work.

[DarkStarSword]

TextureOverrides command lists have to be enabled via the checktextureoverride command from somewhere that is already active (typically a ShaderOverride or ShaderRegex), e.g. to enable all TextureOverrides on Vertex Buffer Slot 0, Index Buffer and Pixel Shader Texture Slot 0 you can do:

[ShaderRegexEnableTextureOverrides]
shader_model = vs_4_0 vs_4_1 vs_5_0 vs_5_1
; Doing texture matches first in case your mesh matches replace the draw call:
checktextureoverride = ps-t0
checktextureoverride = vb0
checktextureoverride = ib

For performance reasons it is better to constrain that to only activate when relevant shaders are in use, whether that is by matching the shader hashes in a ShaderOverride section, or adding a pattern to the above regex.

This is covered at this point in the costume modding tutorial:
https://www.youtube.com/watch?v=zWE0xP4MgR8&t=580s