diff --git a/programs/pokitto/My_settings.h b/programs/pokitto/My_settings.h
index 179efc4..70f2aec 100644
--- a/programs/pokitto/My_settings.h
+++ b/programs/pokitto/My_settings.h
@@ -1,3 +1,4 @@
+#define _OSCT 2 // overclock
 //#define PROJ_SHOW_FPS_COUNTER
 #define PROJ_SCREENMODE 13
 #define PROJ_MODE13 1
diff --git a/programs/pokitto/city.cpp b/programs/pokitto/city.cpp
index 41de5f6..bc345ad 100644
--- a/programs/pokitto/city.cpp
+++ b/programs/pokitto/city.cpp
@@ -132,6 +132,7 @@ static inline void handleCollision(S3L_Vec4 *pos, S3L_Vec4 previousPos)
 int main()
 {  
   pokitto.begin();
+//  pokitto.display.persistence = 1;
   pokitto.setFrameRate(60);
   pokitto.display.load565Palette(cityPalette);
 
diff --git a/programs/pokitto/city_overclock.bin b/programs/pokitto/city_overclock.bin
new file mode 100755
index 0000000..8a08873
Binary files /dev/null and b/programs/pokitto/city_overclock.bin differ
diff --git a/programs/pokitto/level.bin b/programs/pokitto/level.bin
index a7d0d85..b36708e 100755
Binary files a/programs/pokitto/level.bin and b/programs/pokitto/level.bin differ
diff --git a/programs/pokitto/level.cpp b/programs/pokitto/level.cpp
index c250d06..8432cd1 100644
--- a/programs/pokitto/level.cpp
+++ b/programs/pokitto/level.cpp
@@ -63,25 +63,24 @@ S3L_ScreenCoord subsampleMap[BASE_W + SUBSAMPLE];
 
 uint32_t previousTriangle = 100;
 
-static inline uint8_t addIntensity(uint8_t color, int16_t intensity)
+static inline uint8_t addIntensity(uint8_t color, uint8_t intensity)
 {
-  int16_t newValue = (color & 0b00001111) + intensity; // value as in HSV
-  // TODO: ^ this could be uint8? Would be faster! Also in the below function.
+  uint8_t newValue = color + intensity; // value as in HSV
 
-  if (newValue >= 16)
-    newValue = 15;
+  if (color >> 4 == newValue >> 4)
+    return newValue;
 
-  return (color & 0b11110000) | newValue;
+  return color | 0x0F;
 }
 
-static inline uint8_t substractIntensity(uint8_t color, int16_t intensity)
+static inline uint8_t substractIntensity(uint8_t color, uint8_t intensity)
 {
-  int16_t newValue = (color & 0b00001111) - intensity; // value as in HSV
+  uint8_t newValue = color - intensity; // value as in HSV
 
-  if (newValue <= 0)
-    return 0;
+  if (color >> 4 == newValue >> 4)
+    return newValue;
 
-  return (color & 0b11110000) | newValue;
+  return 0;
 }
 
 uint8_t c = 0;
@@ -190,6 +189,7 @@ int main()
 
   pokitto.begin();
 
+//  pokitto.display.persistence = 1;
   pokitto.setFrameRate(60);
 
   pokitto.display.load565Palette(level1Palette);
diff --git a/programs/pokitto/level_overclock.bin b/programs/pokitto/level_overclock.bin
new file mode 100755
index 0000000..f6fe176
Binary files /dev/null and b/programs/pokitto/level_overclock.bin differ
diff --git a/programs/pokitto/modelViewer.cpp b/programs/pokitto/modelViewer.cpp
index 25ef400..c81cdeb 100644
--- a/programs/pokitto/modelViewer.cpp
+++ b/programs/pokitto/modelViewer.cpp
@@ -7,7 +7,7 @@
 
 #include "Pokitto.h"
 
-/* Before including small3dlib, we need to define some values for it, such as
+/* Before including small3dli, we need to define some values for it, such as
   the resolution, the name of the pixel drawing function etc.: */
 
 #define S3L_PIXEL_FUNCTION pixelFunc
diff --git a/programs/pokitto/modelviewer.bin b/programs/pokitto/modelviewer.bin
new file mode 100755
index 0000000..a0b197e
Binary files /dev/null and b/programs/pokitto/modelviewer.bin differ
diff --git a/programs/pokitto/modelviewer_overclock.bin b/programs/pokitto/modelviewer_overclock.bin
new file mode 100755
index 0000000..87bc2ef
Binary files /dev/null and b/programs/pokitto/modelviewer_overclock.bin differ