diff --git a/TODO b/TODO
index a7fe1b8..9916908 100644
--- a/TODO
+++ b/TODO
@@ -1,6 +1,8 @@
 Technology Preview 2 :
 - Fully move layer management from BaseForm to BaseFormLayer.
 - Replace math.h methods by optimized ones (fastfloor, fastsin...).
+- Reimplement perlin noise and custom noise.
+- Add ridged noise option (with configurable ridge offset and direction).
 - Replace terrain canvas editor by full sculpting editor.
    => Add a generation dialog, with fixed resolution.
    => Store local terrain modifications in fully dynamic canvas.
diff --git a/lib_paysages/noise.c b/lib_paysages/noise.c
index 22bfd0f..9f4fc3d 100644
--- a/lib_paysages/noise.c
+++ b/lib_paysages/noise.c
@@ -5,7 +5,7 @@
 #include <string.h>
 
 #include "tools.h"
-#include "simplexnoise.h"
+#include "noisesimplex.h"
 
 #define MAX_LEVEL_COUNT 30
 
@@ -22,7 +22,7 @@ struct NoiseGenerator
 
 void noiseInit()
 {
-    simplexNoiseInit();
+    noiseSimplexInit();
 }
 
 void noiseQuit()
@@ -274,7 +274,7 @@ void noiseNormalizeHeight(NoiseGenerator* generator, double min_height, double m
 
 static inline double _get1DRawNoiseValue(NoiseGenerator* generator, double x)
 {
-    return simplexNoiseGet2DValue(x, 0.0) * 0.5;
+    return noiseSimplexGet2DValue(x, 0.0) * 0.5;
 }
 
 static inline double _get1DLevelValue(NoiseGenerator* generator, NoiseLevel* level, double x)
@@ -336,7 +336,7 @@ double noiseGet1DDetail(NoiseGenerator* generator, double x, double detail)
 
 static inline double _get2DRawNoiseValue(NoiseGenerator* generator, double x, double y)
 {
-    return simplexNoiseGet2DValue(x, y) * 0.5;
+    return noiseSimplexGet2DValue(x, y) * 0.5;
 }
 
 static inline double _get2DLevelValue(NoiseGenerator* generator, NoiseLevel* level, double x, double y)
@@ -398,7 +398,7 @@ double noiseGet2DDetail(NoiseGenerator* generator, double x, double y, double de
 
 static inline double _get3DRawNoiseValue(NoiseGenerator* generator, double x, double y, double z)
 {
-    return simplexNoiseGet3DValue(x, y, z) * 0.5;
+    return noiseSimplexGet3DValue(x, y, z) * 0.5;
 }
 
 static inline double _get3DLevelValue(NoiseGenerator* generator, NoiseLevel* level, double x, double y, double z)
diff --git a/lib_paysages/simplexnoise.c b/lib_paysages/noisesimplex.c
similarity index 98%
rename from lib_paysages/simplexnoise.c
rename to lib_paysages/noisesimplex.c
index a588ff2..79e7451 100644
--- a/lib_paysages/simplexnoise.c
+++ b/lib_paysages/noisesimplex.c
@@ -1,4 +1,4 @@
-#include "simplexnoise.h"
+#include "noisesimplex.h"
 
 /*
  * Simplex noise implementation.
@@ -119,7 +119,7 @@ static double _dot4(Grad4 g, double x, double y, double z, double w)
     return g.x * x + g.y * y + g.z * z + g.w * w;
 }
 
-void simplexNoiseInit()
+void noiseSimplexInit()
 {
     int i;
 
@@ -139,7 +139,7 @@ void simplexNoiseInit()
     _G4 = (5.0 - sqrt(5.0)) / 20.0;
 }
 
-double simplexNoiseGet2DValue(double xin, double yin)
+double noiseSimplexGet2DValue(double xin, double yin)
 {
     double n0, n1, n2; /* Noise contributions from the three corners */
     /* Skew the input space to determine which simplex cell we're in */
@@ -204,7 +204,7 @@ double simplexNoiseGet2DValue(double xin, double yin)
     return 70.0 * (n0 + n1 + n2);
 }
 
-double simplexNoiseGet3DValue(double xin, double yin, double zin)
+double noiseSimplexGet3DValue(double xin, double yin, double zin)
 {
     double n0, n1, n2, n3; /* Noise contributions from the four corners */
     /* Skew the input space to determine which simplex cell we're in */
@@ -338,7 +338,7 @@ double simplexNoiseGet3DValue(double xin, double yin, double zin)
     return 32.0 * (n0 + n1 + n2 + n3);
 }
 
-double simplexNoiseGet4DValue(double x, double y, double z, double w)
+double noiseSimplexGet4DValue(double x, double y, double z, double w)
 {
     double n0, n1, n2, n3, n4; /* Noise contributions from the five corners */
     /* Skew the (x,y,z,w) space to determine which cell of 24 simplices we're in */
diff --git a/lib_paysages/noisesimplex.h b/lib_paysages/noisesimplex.h
new file mode 100644
index 0000000..1ecdd77
--- /dev/null
+++ b/lib_paysages/noisesimplex.h
@@ -0,0 +1,17 @@
+#ifndef _PAYSAGES_SIMPLEXNOISE_H_
+#define _PAYSAGES_SIMPLEXNOISE_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void noiseSimplexInit();
+double noiseSimplexGet2DValue(double xin, double yin);
+double noiseSimplexGet3DValue(double xin, double yin, double zin);
+double noiseSimplexGet4DValue(double x, double y, double z, double w);
+    
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/lib_paysages/simplexnoise.h b/lib_paysages/simplexnoise.h
deleted file mode 100644
index 4e7be70..0000000
--- a/lib_paysages/simplexnoise.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef _PAYSAGES_SIMPLEXNOISE_H_
-#define _PAYSAGES_SIMPLEXNOISE_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-void simplexNoiseInit();
-double simplexNoiseGet2DValue(double xin, double yin);
-double simplexNoiseGet3DValue(double xin, double yin, double zin);
-double simplexNoiseGet4DValue(double x, double y, double z, double w);
-    
-#ifdef __cplusplus
-}
-#endif
-
-#endif