diff --git a/include/PICA/shader.hpp b/include/PICA/shader.hpp
index c5af3443..2978192e 100644
--- a/include/PICA/shader.hpp
+++ b/include/PICA/shader.hpp
@@ -12,6 +12,7 @@ enum class ShaderType {
 
 namespace ShaderOpcodes {
 	enum : u32 {
+		ADD = 0x00,
 		DP4 = 0x02,
 		MOV = 0x13,
 		END = 0x22
@@ -37,6 +38,7 @@ class PICAShader {
 	vec4f& getDest(u32 dest);
 
 	// Shader opcodes
+	void add(u32 instruction);
 	void dp4(u32 instruction);
 	void mov(u32 instruction);
 
diff --git a/src/core/PICA/shader_interpreter.cpp b/src/core/PICA/shader_interpreter.cpp
index b213b1ed..0aae6da6 100644
--- a/src/core/PICA/shader_interpreter.cpp
+++ b/src/core/PICA/shader_interpreter.cpp
@@ -8,6 +8,7 @@ void PICAShader::run() {
 		const u32 opcode = instruction >> 26; // Top 6 bits are the opcode
 
 		switch (opcode) {
+			case ShaderOpcodes::ADD: add(instruction); break;
 			case ShaderOpcodes::DP4: dp4(instruction); break;
 			case ShaderOpcodes::END: return; // Stop running shader
 			case ShaderOpcodes::MOV: mov(instruction); break;
@@ -36,6 +37,27 @@ PICAShader::vec4f& PICAShader::getDest(u32 dest) {
 	Helpers::panic("[PICA] Unimplemented dest: %X", dest);
 }
 
+void PICAShader::add(u32 instruction) {
+	const u32 operandDescriptor = operandDescriptors[instruction & 0x7f];
+	const u32 src1 = (instruction >> 12) & 0x7f;
+	const u32 src2 = (instruction >> 7) & 0x1f; // src2 coming first because PICA moment
+	const u32 idx = (instruction >> 19) & 3;
+	const u32 dest = (instruction >> 21) & 0x1f;
+
+	if (idx) Helpers::panic("[PICA] ADD: idx != 0");
+	vec4f srcVec1 = getSourceSwizzled<1>(src1, operandDescriptor);
+	vec4f srcVec2 = getSourceSwizzled<2>(src2, operandDescriptor);
+
+	vec4f& destVector = getDest(dest);
+
+	u32 componentMask = operandDescriptor & 0xf;
+	for (int i = 0; i < 4; i++) {
+		if (componentMask & (1 << i)) {
+			destVector[3 - i] = srcVec1[3 - i] + srcVec2[3 - 1];
+		}
+	}
+}
+
 void PICAShader::mov(u32 instruction) {
 	const u32 operandDescriptor = operandDescriptors[instruction & 0x7f];
 	const u32 src = (instruction >> 12) & 0x7f;
@@ -46,7 +68,6 @@ void PICAShader::mov(u32 instruction) {
 	vec4f srcVector = getSourceSwizzled<1>(src, operandDescriptor);
 	vec4f& destVector = getDest(dest);
 
-	// Destination component mask. Tells us which lanes of the destination register will be written to
 	u32 componentMask = operandDescriptor & 0xf;
 	for (int i = 0; i < 4; i++) {
 		if (componentMask & (1 << i)) {
@@ -69,7 +90,6 @@ void PICAShader::dp4(u32 instruction) {
 	vec4f& destVector = getDest(dest);
 	f24 dot = srcVec1[0] * srcVec2[0] + srcVec1[1] * srcVec2[1] + srcVec1[2] * srcVec2[2] + srcVec1[3] * srcVec2[3];
 
-	// Destination component mask. Tells us which lanes of the destination register will be written to
 	u32 componentMask = operandDescriptor & 0xf;
 	for (int i = 0; i < 4; i++) {
 		if (componentMask & (1 << i)) {