Guide CS2 Decal Removal — Signature & Fastcall Hook for Client.dll

[byte_corvus]

Sick of the visual clutter in CS2? Between the massive blood splatters and bullet holes, visibility in Premier can drop significantly during heavy spray-downs. If you are working on an internal base, you can easily nuke these decals by hooking the render function in client.dll.

Engine Logic & Render Hooks

The goal here is to intercept the decal rendering pipeline. By returning a null pointer when your toggle is active, the engine simply skips the drawing calls for bullet decals, blood stains, and other surface overlays. It's a clean way to maintain high visibility without messing with game files or risky material overrides.

// 44 88 4C 24 ? 55 53 @ client.dll
void* __fastcall hk_render_decals(__int64 render_ctx, __int64** render_view, bool pass_flag_A, bool pass_flag_B) {
    if (m_remove_decals)
        return nullptr;

    return hooks::m_render_decals.call<void*>(render_ctx, render_view, pass_flag_A, pass_flag_B);
}

Implementation Notes

1. Signature: Use the provided 44 88 4C 24 ? 55 53 to find the function offset in the current client.dll build.
2. Calling Convention: This is a __fastcall, so ensure your hook signature matches the stack layout precisely to avoid stack corruption.
3. Performance: Since this is called frequently during rendering, keeping the logic to a simple boolean check is optimal.

Spoiler: Technical FAQ

Does this affect FPS?
Actually, it can slightly improve frame stability in heavy firefights by reducing the number of draw calls the engine has to process.

Is there a risk of crash?
Only if your hook wrapper is scuffed. Returning nullptr here is handled safely by the engine's rendering logic.

Will this work on sub-tick matches?
Yes, this is purely a visual/rendering stage hook and doesn't interfere with networking or the sub-tick system.

Definitely useful for those building a "legit" oriented internal where clean visuals are a priority. Anyone tried implementing this alongside a bloom/fog remover for a full clean-map look?