diff --git a/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp b/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp
index 689821d8..0b6baf6b 100644
--- a/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp
+++ b/src/Graphics/OpenGLContext/GLSL/glsl_CombinerProgramBuilder.cpp
@@ -278,6 +278,7 @@ public:
 			"IN highp vec2 aTexCoord;							\n"
 			"IN lowp float aNumLights;							\n"
 			"IN highp vec4 aModify;								\n"
+			"IN highp vec3 aBaryCoords;							\n"
 			"													\n"
 			"uniform int uTexturePersp;							\n"
 			"uniform lowp int uTextureFilterMode;		\n"
@@ -297,6 +298,7 @@ public:
 			"OUT mediump vec2 vLodTexCoord;						\n"
 			"OUT lowp float vNumLights;							\n"
 			"OUT lowp vec4 vShadeColor;							\n"
+			"OUT highp vec4 vBaryCoords;						\n"
 		;
 		if (!_glinfo.isGLESX || _glinfo.noPerspective)
 			m_part += "noperspective OUT lowp vec4 vShadeColorNoperspective;\n";
@@ -348,6 +350,7 @@ public:
 			"    else														\n"
 			"      vShadeColor.rgb = vec3(fp);								\n"
 			"  }															\n"
+			"  vBaryCoords = vec4(aBaryCoords, 0.5f);						\n"
 			;
 	}
 };
@@ -362,6 +365,7 @@ public:
 			"IN lowp vec4 aColor;											\n"
 			"IN lowp float aNumLights;										\n"
 			"IN highp vec4 aModify;											\n"
+			"IN highp vec3 aBaryCoords;										\n"
 			"																\n"
 			"uniform lowp int uFogUsage;									\n"
 			"uniform mediump vec2 uFogScale;								\n"
@@ -369,6 +373,7 @@ public:
 			"																\n"
 			"OUT lowp float vNumLights;										\n"
 			"OUT lowp vec4 vShadeColor;										\n"
+			"OUT highp vec4 vBaryCoords;									\n"
 		;
 		if (!_glinfo.isGLESX || _glinfo.noPerspective)
 			m_part += "noperspective OUT lowp vec4 vShadeColorNoperspective;\n";
@@ -405,6 +410,7 @@ public:
 			"    else														\n"
 			"      vShadeColor.rgb = vec3(fp);								\n"
 			"  }															\n"
+			"  vBaryCoords = vec4(aBaryCoords, 0.5f);						\n"
 			;
 	}
 };
@@ -418,11 +424,13 @@ public:
 			"IN highp vec4 aRectPosition;						\n"
 			"IN highp vec2 aTexCoord0;							\n"
 			"IN highp vec2 aTexCoord1;							\n"
+			"IN highp vec2 aBaryCoords;							\n"
 			"													\n"
 			"OUT highp vec2 vTexCoord0;							\n"
 			"OUT highp vec2 vTexCoord1;							\n"
 			"OUT lowp vec4 vShadeColor;							\n"
-		;
+			"OUT highp vec4 vBaryCoords;"
+			;
 		if (!_glinfo.isGLESX || _glinfo.noPerspective)
 			m_part += "noperspective OUT lowp vec4 vShadeColorNoperspective;\n";
 		else
@@ -436,6 +444,7 @@ public:
 			"  vShadeColorNoperspective = uRectColor;			\n"
 			"  vTexCoord0 = aTexCoord0;							\n"
 			"  vTexCoord1 = aTexCoord1;							\n"
+			"  vBaryCoords = vec4(aBaryCoords, vec2(1.0) - aBaryCoords);	\n"
 			;
 	}
 };
@@ -447,8 +456,10 @@ public:
 	{
 		m_part =
 			"IN highp vec4 aRectPosition;						\n"
+			"IN highp vec2 aBaryCoords;							\n"
 			"													\n"
 			"OUT lowp vec4 vShadeColor;							\n"
+			"OUT highp vec4 vBaryCoords; \n"
 			;
 		if (!_glinfo.isGLESX || _glinfo.noPerspective)
 			m_part += "noperspective OUT lowp vec4 vShadeColorNoperspective;\n";
@@ -461,6 +472,7 @@ public:
 			"  gl_Position = aRectPosition;						\n"
 			"  vShadeColor = uRectColor;						\n"
 			"  vShadeColorNoperspective = uRectColor;			\n"
+			"  vBaryCoords = vec4(aBaryCoords, vec2(1.0f) - aBaryCoords);\n"
 			;
 	}
 };
@@ -980,6 +992,7 @@ public:
 			"IN highp vec2 vTexCoord1;		\n"
 			"IN mediump vec2 vLodTexCoord;	\n"
 			"IN lowp float vNumLights;		\n"
+			"IN highp vec4 vBaryCoords;		\n"
 		;
 
 		if (_glinfo.dual_source_blending) {
@@ -1086,6 +1099,7 @@ public:
 		m_part +=
 			"IN lowp vec4 vShadeColor;	\n"
 			"IN lowp float vNumLights;	\n"
+			"IN highp vec4 vBaryCoords; \n"
 		;
 
 		if (_glinfo.dual_source_blending) {
diff --git a/src/Graphics/OpenGLContext/GLSL/glsl_Utils.cpp b/src/Graphics/OpenGLContext/GLSL/glsl_Utils.cpp
index 0909ee4a..2dc3e0a1 100644
--- a/src/Graphics/OpenGLContext/GLSL/glsl_Utils.cpp
+++ b/src/Graphics/OpenGLContext/GLSL/glsl_Utils.cpp
@@ -9,6 +9,7 @@ void Utils::locateAttributes(GLuint _program, bool _rect, bool _textures)
 {
 	if (_rect) {
 		glBindAttribLocation(_program, opengl::rectAttrib::position, "aRectPosition");
+		glBindAttribLocation(_program, opengl::rectAttrib::barycoords, "aBaryCoords");
 		if (_textures) {
 			glBindAttribLocation(_program, opengl::rectAttrib::texcoord0, "aTexCoord0");
 			glBindAttribLocation(_program, opengl::rectAttrib::texcoord1, "aTexCoord1");
@@ -20,6 +21,7 @@ void Utils::locateAttributes(GLuint _program, bool _rect, bool _textures)
 	glBindAttribLocation(_program, opengl::triangleAttrib::color, "aColor");
 	glBindAttribLocation(_program, opengl::triangleAttrib::numlights, "aNumLights");
 	glBindAttribLocation(_program, opengl::triangleAttrib::modify, "aModify");
+	glBindAttribLocation(_program, opengl::triangleAttrib::barycoords, "aBaryCoords");
 	if (_textures)
 		glBindAttribLocation(_program, opengl::triangleAttrib::texcoord, "aTexCoord");
 }
diff --git a/src/Graphics/OpenGLContext/opengl_Attributes.cpp b/src/Graphics/OpenGLContext/opengl_Attributes.cpp
index 6f05bb53..d209efd5 100644
--- a/src/Graphics/OpenGLContext/opengl_Attributes.cpp
+++ b/src/Graphics/OpenGLContext/opengl_Attributes.cpp
@@ -8,6 +8,7 @@ namespace opengl {
 		const GLuint texcoord = 2U;
 		const GLuint numlights = 3U;
 		const GLuint modify = 4U;
+		const GLuint barycoords = 8U;
 	}
 
 	// Rect attributes
@@ -15,5 +16,6 @@ namespace opengl {
 		const GLuint position = 5U;
 		const GLuint texcoord0 = 6U;
 		const GLuint texcoord1 = 7U;
+		const GLuint barycoords = 9U;
 	}
 }
diff --git a/src/Graphics/OpenGLContext/opengl_Attributes.h b/src/Graphics/OpenGLContext/opengl_Attributes.h
index 89f7167a..3629500d 100644
--- a/src/Graphics/OpenGLContext/opengl_Attributes.h
+++ b/src/Graphics/OpenGLContext/opengl_Attributes.h
@@ -10,6 +10,7 @@ namespace opengl {
 		extern const GLuint texcoord;
 		extern const GLuint numlights;
 		extern const GLuint modify;
+		extern const GLuint barycoords;
 	}
 
 	// Rect attributes
@@ -17,7 +18,8 @@ namespace opengl {
 		extern const GLuint position;
 		extern const GLuint texcoord0;
 		extern const GLuint texcoord1;
+		extern const GLuint barycoords;
 	}
 
-#define MaxAttribIndex 8
+#define MaxAttribIndex 10
 }
diff --git a/src/Graphics/OpenGLContext/opengl_BufferedDrawer.cpp b/src/Graphics/OpenGLContext/opengl_BufferedDrawer.cpp
index e55b1717..08d1a416 100644
--- a/src/Graphics/OpenGLContext/opengl_BufferedDrawer.cpp
+++ b/src/Graphics/OpenGLContext/opengl_BufferedDrawer.cpp
@@ -29,9 +29,11 @@ BufferedDrawer::BufferedDrawer(const GLInfo & _glinfo, CachedVertexAttribArray *
 	m_cachedAttribArray->enableVertexAttribArray(rectAttrib::position, true);
 	m_cachedAttribArray->enableVertexAttribArray(rectAttrib::texcoord0, true);
 	m_cachedAttribArray->enableVertexAttribArray(rectAttrib::texcoord1, true);
+	m_cachedAttribArray->enableVertexAttribArray(rectAttrib::barycoords, true);
 	glVertexAttribPointer(rectAttrib::position, 4, GL_FLOAT, GL_FALSE, sizeof(RectVertex), (const GLvoid *)(offsetof(RectVertex, x)));
 	glVertexAttribPointer(rectAttrib::texcoord0, 2, GL_FLOAT, GL_FALSE, sizeof(RectVertex), (const GLvoid *)(offsetof(RectVertex, s0)));
 	glVertexAttribPointer(rectAttrib::texcoord1, 2, GL_FLOAT, GL_FALSE, sizeof(RectVertex), (const GLvoid *)(offsetof(RectVertex, s1)));
+	glVertexAttribPointer(rectAttrib::barycoords, 2, GL_FLOAT, GL_FALSE, sizeof(RectVertex), (const GLvoid *)(offsetof(RectVertex, bc0)));
 
 	/* Init buffers for triangles */
 	glGenVertexArrays(1, &m_trisBuffers.vao);
@@ -43,10 +45,12 @@ BufferedDrawer::BufferedDrawer(const GLInfo & _glinfo, CachedVertexAttribArray *
 	m_cachedAttribArray->enableVertexAttribArray(triangleAttrib::texcoord, true);
 	m_cachedAttribArray->enableVertexAttribArray(triangleAttrib::modify, true);
 	m_cachedAttribArray->enableVertexAttribArray(triangleAttrib::numlights, false);
+	m_cachedAttribArray->enableVertexAttribArray(triangleAttrib::barycoords, true);
 	glVertexAttribPointer(triangleAttrib::position, 4, GL_FLOAT, GL_FALSE, sizeof(Vertex), (const GLvoid *)(offsetof(Vertex, x)));
 	glVertexAttribPointer(triangleAttrib::color, 4, GL_FLOAT, GL_FALSE, sizeof(Vertex), (const GLvoid *)(offsetof(Vertex, r)));
 	glVertexAttribPointer(triangleAttrib::texcoord, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (const GLvoid *)(offsetof(Vertex, s)));
 	glVertexAttribPointer(triangleAttrib::modify, 4, GL_BYTE, GL_TRUE, sizeof(Vertex), (const GLvoid *)(offsetof(Vertex, modify)));
+	glVertexAttribPointer(triangleAttrib::barycoords, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (const GLvoid*)(offsetof(Vertex, bc0)));
 }
 
 void BufferedDrawer::_initBuffer(Buffer & _buffer, GLuint _bufSize)
@@ -162,6 +166,9 @@ void BufferedDrawer::_convertFromSPVertex(bool _flatColors, u32 _count, const SP
 		dst.s = src.s;
 		dst.t = src.t;
 		dst.modify = src.modify;
+		dst.bc0 = src.bc0;
+		dst.bc1 = src.bc1;
+		dst.bc2 = src.bc2;
 	}
 }
 
diff --git a/src/Graphics/OpenGLContext/opengl_BufferedDrawer.h b/src/Graphics/OpenGLContext/opengl_BufferedDrawer.h
index 40576b5c..7af163b5 100644
--- a/src/Graphics/OpenGLContext/opengl_BufferedDrawer.h
+++ b/src/Graphics/OpenGLContext/opengl_BufferedDrawer.h
@@ -58,6 +58,7 @@ namespace opengl {
 			f32 r, g, b, a;
 			f32 s, t;
 			u32 modify;
+			f32 bc0, bc1, bc2;
 		};
 
 		void _initBuffer(Buffer & _buffer, GLuint _bufSize);
diff --git a/src/GraphicsDrawer.cpp b/src/GraphicsDrawer.cpp
index 1b2ba02c..2547f3f8 100644
--- a/src/GraphicsDrawer.cpp
+++ b/src/GraphicsDrawer.cpp
@@ -58,6 +58,13 @@ void GraphicsDrawer::addTriangle(u32 _v0, u32 _v1, u32 _v2)
 		triangles.vertices[_v1].modify |
 		triangles.vertices[_v2].modify;
 
+	for (u32 i = firstIndex; i < triangles.num; ++i) {
+		SPVertex& vtx = triangles.vertices[triangles.elements[i]];
+		vtx.bc0 = i - firstIndex == 0 ? 1.0f : 0.0f;
+		vtx.bc1 = i - firstIndex == 1 ? 1.0f : 0.0f;
+		vtx.bc2 = i - firstIndex == 2 ? 1.0f : 0.0f;
+	}
+
 	if ((gSP.geometryMode & G_LIGHTING) == 0) {
 		if ((gSP.geometryMode & G_SHADE) == 0) {
 			// Prim shading
@@ -853,6 +860,10 @@ void GraphicsDrawer::drawScreenSpaceTriangle(u32 _numVtx, graphics::DrawModePara
 		if (vtx.x < 0) vtx.clip |= CLIP_NEGX;
 		if (vtx.y > gSP.viewport.height) vtx.clip |= CLIP_POSY;
 		if (vtx.y < 0) vtx.clip |= CLIP_NEGY;
+
+		vtx.bc0 = (i % 3 == 0) ? 1.0f : 0.0f;
+		vtx.bc1 = (i % 3 == 1) ? 1.0f : 0.0f;
+		vtx.bc2 = (i % 3 == 2) ? 1.0f : 0.0f;
 	}
 	m_modifyVertices = MODIFY_ALL;
 
@@ -1061,6 +1072,15 @@ void GraphicsDrawer::drawRect(int _ulx, int _uly, int _lrx, int _lry)
 	m_rect[3].z = Z;
 	m_rect[3].w = W;
 
+	m_rect[0].bc0 = 0.0f;
+	m_rect[0].bc1 = 0.0f;
+	m_rect[1].bc0 = 0.0f;
+	m_rect[1].bc1 = 1.0f;
+	m_rect[2].bc0 = 1.0f;
+	m_rect[2].bc1 = 0.0f;
+	m_rect[3].bc0 = 1.0f;
+	m_rect[3].bc1 = 1.0f;
+
 	DisplayWindow & wnd = dwnd();
 	if (wnd.isAdjustScreen() && (gDP.colorImage.width > VI.width * 98 / 100) && (static_cast<u32>(_lrx - _ulx) < VI.width * 9 / 10)) {
 		const float scale = wnd.getAdjustScale();
@@ -1448,6 +1468,16 @@ void GraphicsDrawer::drawTexturedRect(const TexturedRectParams & _params)
 			m_rect[i].x *= scale;
 	}
 
+	m_rect[0].bc0 = 0.0f;
+	m_rect[0].bc1 = 0.0f;
+	m_rect[1].bc0 = 0.0f;
+	m_rect[1].bc1 = 1.0f;
+	m_rect[2].bc0 = 1.0f;
+	m_rect[2].bc1 = 0.0f;
+	m_rect[3].bc0 = 1.0f;
+	m_rect[3].bc1 = 1.0f;
+
+
 	if (bUseTexrectDrawer) {
 		if (m_bBGMode) {
 			m_texrectDrawer.addBackgroundRect();
diff --git a/src/GraphicsDrawer.h b/src/GraphicsDrawer.h
index 6aa52dd3..bab599a9 100644
--- a/src/GraphicsDrawer.h
+++ b/src/GraphicsDrawer.h
@@ -34,6 +34,7 @@ struct RectVertex
 {
 	float x, y, z, w;
 	float s0, t0, s1, t1;
+	float bc0, bc1;
 };
 
 typedef std::chrono::milliseconds Milliseconds;
diff --git a/src/gSP.h b/src/gSP.h
index ccdf0982..a187ec8e 100644
--- a/src/gSP.h
+++ b/src/gSP.h
@@ -43,6 +43,7 @@ struct SPVertex
 	u32 modify;
 	u8 HWLight;
 	u8 clip;
+	f32 bc0, bc1, bc2;
 	s16 flag;
 };