diff --git a/Extended_Interface.hpp b/Extended_Interface.hpp
index 69662fd..0e6db9e 100755
--- a/Extended_Interface.hpp
+++ b/Extended_Interface.hpp
@@ -25,6 +25,8 @@ Interface_Structure Interface_Penetrate_Teammates;
 
 Interface_Structure Interface_Aim_Intersection;
 
+Interface_Structure Interface_Penetration_Damage;
+
 Interface_Structure Interface_Equipment_Distance;
 
 Interface_Structure Interface_Storm_Rotation_Radius;
@@ -64,6 +66,8 @@ void Implement_Extended_Interface()
 
 	Create_Console_Interface(Pointer_Name(Interface_Aim_Intersection), (char*)"1", nullptr);
 
+	Create_Console_Interface(Pointer_Name(Interface_Penetration_Damage), (char*)"25", nullptr);
+
 	Create_Console_Interface(Pointer_Name(Interface_Equipment_Distance), (char*)"2048", nullptr);
 
 	Create_Console_Interface(Pointer_Name(Interface_Storm_Rotation_Radius), (char*)"24", nullptr);
diff --git a/Perform_Shove_Trace.hpp b/Perform_Shove_Trace.hpp
index c2e0689..efdbd40 100755
--- a/Perform_Shove_Trace.hpp
+++ b/Perform_Shove_Trace.hpp
@@ -12,12 +12,12 @@ void* Original_Perform_Shove_Trace_Caller;
 
 void __declspec(naked) Redirected_Perform_Shove_Trace()
 {
-	asm("lea -304(%ebp), %eax");
-	asm("push %eax");
-	asm("call *%edx");
-	asm("pusha");
-	asm("mov %esp, %ecx");
+	asm("leal -304(%ebp), %eax");
+	asm("pushl %eax");
+	asm("calll *%edx");
+	asm("pushal");
+	asm("movl %esp, %ecx");
 	asm("calll %0" : : "m"(Perform_Shove_Trace));
-	asm("popa");
-	asm("jmp *%0" : : "m"(Original_Perform_Shove_Trace_Caller));
+	asm("popal");
+	asm("jmpl *%0" : : "m"(Original_Perform_Shove_Trace_Caller));
 }
\ No newline at end of file
diff --git a/Perform_Trace.hpp b/Perform_Trace.hpp
index 31bdf1c..cf9b8fc 100755
--- a/Perform_Trace.hpp
+++ b/Perform_Trace.hpp
@@ -1,5 +1,24 @@
 void* Perform_Trace_Target;
 
+__declspec(noinline) float Calculate_Damage(void* Weapon_Data, float Distance)
+{
+	static void* Calculate_Damage = (void*)((unsigned __int32)GetModuleHandleW(L"server.dll") + 3950416);
+
+	float Damage;
+
+	asm("pushl %esi");
+	asm("movl %0, %%esi" : : "m"(Weapon_Data));
+	asm("subl $16, %esp");
+	asm("movss %0, %%xmm0" : : "m"(Distance) : "esp");
+	asm("movdqu %xmm0, (%esp)");
+	asm("calll *%0" : : "m"(Calculate_Damage));
+	asm("movd %%xmm0, %0" : "=m"(Damage));
+	asm("addl $16, %esp");
+	asm("popl %esi");
+
+	return Damage;
+}
+
 float Vector_Normalize(float* Vector)
 {
 	using Vector_Normalize_Type = float(__thiscall*)(float* Vector);
@@ -33,22 +52,97 @@ void __thiscall Perform_Trace(void* Stack)
 
 	if (Entity == (void*)((unsigned __int32)Perform_Trace_Target ^ 1))
 	{
+		__int32 Group = *(__int32*)((unsigned __int32)Stack + 304);
+
 		if (Interface_Aim_Intersection.Integer == 0)
 		{
-			if (*(__int32*)((unsigned __int32)Stack + 304) != 1)
+			if (Group != 1)
 			{
 				return;
 			}
 		}
 
+		float* End = (float*)((unsigned __int32)Stack + 248);
+
 		void* Trace_Information = *(void**)((unsigned __int32)Stack + 36);
 
+		if (Interface_Penetration_Damage.Integer != 0) //that's very cutted version of actual function [*::TraceAttack]
+		{
+			float* Start = (float*)((unsigned __int32)Stack + 236);
+
+			float Damage = Calculate_Damage(*(void**)((unsigned __int32)Trace_Information + 4), __builtin_sqrtf(__builtin_powf(End[0] - Start[0], 2) + __builtin_powf(End[1] - Start[1], 2) + __builtin_powf(End[2] - Start[2], 2)));
+			
+			__int32 Identifier = Get_Identifier(Entity, 1, 0);
+
+			auto Apply_Difficulty_Scaling = [&]() -> void
+			{
+				using Get_Difficulty_Type = __int32(__cdecl*)();
+
+				//z_non_head_damage_factor_* (non-replicated unfortunately)
+				//assuming "z_use_next_difficulty_damage_factor" is "1" and "maxplayers" is not "1"
+				float Multipliers[4] = { 0.8f, 0.7f, 0.6f, 1.f };
+
+				Damage *= Multipliers[Get_Difficulty_Type((unsigned __int32)Client_Module + 2650448)()];
+			};
+
+			if (Identifier == 277) //special scaling used by witches
+			{
+				if (Group != 1)
+				{
+					Apply_Difficulty_Scaling();
+				}
+			}
+			else
+			{
+				if (Identifier == 264) //special scaling used by common infected
+				{
+					if (Identifier * Group == 264) //these are killed instantly on headshot
+					{
+						Damage = FLT_MAX;
+					}
+					else
+					{
+						Apply_Difficulty_Scaling();
+
+						//tbi: some guns are using special scaling (e.g. deagle)
+					}
+				}
+				else //special scaling used by non-common infected
+				{
+					if (*(__int32*)((unsigned __int32)Trace_Information + 36) != -2139094974) //explosives are doing "radial" damage instead
+					{
+						if (Identifier != 276) //tanks aren't scaled
+						{
+							Damage *= 1.f + 3.f * (Group == 1) + 0.25f * (Group == 3) - 0.25f * (Group == 7); //or: 0.25f * ((Group == 3) + -(Group == 7))
+
+							if (Identifier * Group == 270) //killed instantly on **hooked** headshot
+							{
+								if (*(void**)((unsigned __int32)Entity + 8040) != INVALID_HANDLE_VALUE)
+								{
+									Damage = FLT_MAX;
+								}
+							}
+						}
+					}
+
+					Damage = (__int32)(Damage + 1.f * (Damage < 1)); //rounding isn't applied to common infected or witches. make sure damage isn't zero before rounding
+				}
+
+				//actual shotgun multiplications (z_shotgun_bonus_damage_multiplier, z_shotgun_bonus_damage_range) would require extraneous tracing... so they're not here for moment
+			}
+
+			wprintf(L"hitgroup %d -> damage %f\n", Group, Damage); //compared to 'picker' output (along with nb_stop 1), since it's unfinished feature
+
+			if (Damage < Interface_Penetration_Damage.Floating_Point)
+			{
+				return;
+			}
+		}
+
 		if ((*(__int32*)((unsigned __int32)Trace_Information + 36) & 255) + *(__int32*)((unsigned __int32)Entity + 52) == 17)
 		{
 			float Inflictor_Direction[3];
 
-			float* End = (float*)((unsigned __int32)Stack + 248);
-
 			using Get_Center_Type = float*(__thiscall*)(void* Entity);
 
 			float* Start = Get_Center_Type((unsigned __int32)Client_Module + 114400)(*(void**)Trace_Information);
@@ -89,9 +183,9 @@ void* Original_Perform_Trace_Caller;
 
 void __declspec(naked) Redirected_Perform_Trace()
 {
-	asm("pusha");
-	asm("mov %esp, %ecx");
+	asm("pushal");
+	asm("movl %esp, %ecx");
 	asm("calll %0" : : "m"(Perform_Trace));
-	asm("popa");
-	asm("jmp *%0" : : "m"(Original_Perform_Trace_Caller));
+	asm("popal");
+	asm("jmpl *%0" : : "m"(Original_Perform_Trace_Caller));
 }
\ No newline at end of file