diff --git a/code/nel/include/nel/3d/gpu_program_params.h b/code/nel/include/nel/3d/gpu_program_params.h
index a94a0ccf8..d1a3125a2 100644
--- a/code/nel/include/nel/3d/gpu_program_params.h
+++ b/code/nel/include/nel/3d/gpu_program_params.h
@@ -37,6 +37,11 @@
 
 // Project includes
 
+namespace NLMISC {
+	class CVector;
+	class CMatrix;
+}
+
 namespace NL3D {
 
 /**
@@ -61,8 +66,17 @@ public:
 	CGPUProgramParams();
 	virtual ~CGPUProgramParams();
 
-	void set(uint index, float f0, float f1, float f2, float f3);
-	void set(uint index, int i0, int i1, int i2, int i3);
+	void setF(uint index, float f0);
+	void setF(uint index, float f0, float f1);
+	void setF(uint index, float f0, float f1, float f2);
+	void setF(uint index, float f0, float f1, float f2, float f3);
+	void setI(uint index, int i0);
+	void setI(uint index, int i0, int i1);
+	void setI(uint index, int i0, int i1, int i2);
+	void setI(uint index, int i0, int i1, int i2, int i3);
+	void setF(uint index, const NLMISC::CVector& v);
+	void setF(uint index, const NLMISC::CMatrix& m);
+	void setF(uint index, uint num, const float *src);
 
 	// Internal
 	/// Allocate specified number of components if necessary
@@ -83,6 +97,9 @@ public:
 	int *getPtrIByOffset(size_t offset) { return m_Vec[offset].I; }
 	TType getTypeByOffset(size_t offset) { return m_Meta[offset].Type; }
 
+	// Utility
+	static inline uint getNbRegistersByComponents(uint count) { return (count + 3) >> 2; } // vector register per 4 components
+
 private:
 	std::vector<CVec> m_Vec;
 	std::vector<CMeta> m_Meta;
diff --git a/code/nel/src/3d/gpu_program_params.cpp b/code/nel/src/3d/gpu_program_params.cpp
index 78dcab15c..0a03500ea 100644
--- a/code/nel/src/3d/gpu_program_params.cpp
+++ b/code/nel/src/3d/gpu_program_params.cpp
@@ -32,6 +32,8 @@
 
 // NeL includes
 // #include <nel/misc/debug.h>
+#include <nel/misc/vector.h>
+#include <nel/misc/matrix.h>
 
 // Project includes
 
@@ -50,7 +52,28 @@ CGPUProgramParams::~CGPUProgramParams()
 	
 }
 
-void CGPUProgramParams::set(uint index, float f0, float f1, float f2, float f3)
+void CGPUProgramParams::setF(uint index, float f0)
+{
+	float *f = getPtrFByOffset(allocOffset(index, 1, Float));
+	f[0] = f0;
+}
+
+void CGPUProgramParams::setF(uint index, float f0, float f1)
+{
+	float *f = getPtrFByOffset(allocOffset(index, 2, Float));
+	f[0] = f0;
+	f[1] = f1;
+}
+
+void CGPUProgramParams::setF(uint index, float f0, float f1, float f2)
+{
+	float *f = getPtrFByOffset(allocOffset(index, 3, Float));
+	f[0] = f0;
+	f[1] = f1;
+	f[2] = f2;
+}
+
+void CGPUProgramParams::setF(uint index, float f0, float f1, float f2, float f3)
 {
 	float *f = getPtrFByOffset(allocOffset(index, 4, Float));
 	f[0] = f0;
@@ -59,7 +82,28 @@ void CGPUProgramParams::set(uint index, float f0, float f1, float f2, float f3)
 	f[3] = f3;
 }
 
-void CGPUProgramParams::set(uint index, int i0, int i1, int i2, int i3)
+void CGPUProgramParams::setI(uint index, int i0)
+{
+	int *i = getPtrIByOffset(allocOffset(index, 1, Int));
+	i[0] = i0;
+}
+
+void CGPUProgramParams::setI(uint index, int i0, int i1)
+{
+	int *i = getPtrIByOffset(allocOffset(index, 2, Int));
+	i[0] = i0;
+	i[1] = i1;
+}
+
+void CGPUProgramParams::setI(uint index, int i0, int i1, int i2)
+{
+	int *i = getPtrIByOffset(allocOffset(index, 3, Int));
+	i[0] = i0;
+	i[1] = i1;
+	i[2] = i2;
+}
+
+void CGPUProgramParams::setI(uint index, int i0, int i1, int i2, int i3)
 {
 	int *i = getPtrIByOffset(allocOffset(index, 4, Int));
 	i[0] = i0;
@@ -68,6 +112,30 @@ void CGPUProgramParams::set(uint index, int i0, int i1, int i2, int i3)
 	i[3] = i3;
 }
 
+void CGPUProgramParams::setF(uint index, const NLMISC::CVector& v)
+{
+	float *f = getPtrFByOffset(allocOffset(index, 3, Float));
+	f[0] = v.x;
+	f[1] = v.y;
+	f[2] = v.z;
+}
+
+void CGPUProgramParams::setF(uint index, const NLMISC::CMatrix& m)
+{
+	// TODO: Verify this!
+	float *f = getPtrFByOffset(allocOffset(index, 16, Float));
+	NLMISC::CMatrix mt = m;
+	mt.transpose();
+	mt.get(f);
+}
+
+void CGPUProgramParams::setF(uint index, uint num, const float *src)
+{
+	float *f = getPtrFByOffset(allocOffset(index, num, Float));
+	for (uint i = 0; i < num; ++i)
+		f[i] = src[i];
+}
+
 /// Allocate specified number of components if necessary
 size_t CGPUProgramParams::allocOffset(uint index, uint count, TType type)
 {
@@ -96,7 +164,7 @@ size_t CGPUProgramParams::allocOffset(uint index, uint count, TType type)
 
 	// Allocate space
 	offset = m_Meta.size();
-	uint blocks = (count + 3) >> 2; // per 4 components
+	uint blocks = getNbRegistersByComponents(count); // per 4 components
 	m_Meta.resize(offset + blocks);
 	m_Vec.resize(offset + blocks);