The .7z extension indicates a high-ratio compression, usually packed with "loose files" that overwrite original game data. An "HD" mod like this generally aims to solve three main issues:
: Even though it's "just textures," jumping from SD to HD can increase VRAM usage. If your GPU has less than 6GB of memory, you might see a slight dip in frame rates in crowded scenes.
: While primarily a texture archive, "v1" releases often include slight tweaks to 3D models to ensure the new high-res skins don't "clip" through the character's body during animations. Why This Archive Matters