diff --git a/helloRay.cpp b/helloRay.cpp
index 463f3b0..10e5ef4 100644
--- a/helloRay.cpp
+++ b/helloRay.cpp
@@ -10,19 +10,22 @@
      function that will render pixels. It allows super performance. */
 
 #define RCL_COMPUTE_WALL_TEXCOORDS 0
-/* ^ We won't be using textures, so turn them off. */
+#define RCL_COMPUTE_FLOOR_TEXCOORDS 0
+#define RCL_COMPUTE_FLOOR_DEPTH 0
+#define RCL_COMPUTE_FLOOR_DEPTH 0
+#define RCL_COMPUTE_CEILING_DEPTH 0
+/* ^ Turn off features we won't be using, so that the program runs faster.
 
-/* There are many other options that can be defined here, check the library
-   for details. Don't forget to disable the features you won't be using - it
-   will speed up the rendering. */
+  There are many other options that can be defined here, check the library
+  for details. */
 
 #include "raycastlib.h"
 #include "Pokitto.h"
 
 Pokitto::Core pokitto;
 
-RCL_Camera camera; // Defines a view that will be rendered.
-RCL_RayConstraints constraints;
+RCL_Camera camera;              // Defines a view that will be rendered.
+RCL_RayConstraints constraints; // Says the details of casting individual rays.
 
 /* Function that for given square coordinates returns height of the floor
    (in RCL_Units). */
@@ -35,7 +38,9 @@ RCL_Unit floorHeightAt(int16_t x, int16_t y)
          make the walls twice as high. */
 
   /* You can either generate the level procedurally as above, or read it from
-     an array and return it here. */
+     an array and return it here. You can also animate the level here, there
+     are no limits. Just keep in mind this function should be fast because
+     it will get called a lot. */
 }
 
 /* Function that will be called by the library in order to draw individual
@@ -46,7 +51,7 @@ void pixelFunc(RCL_PixelInfo *pixel)
   uint8_t color;
 
   /* The pixel variable holds all kind of info about the pixel to be rendered.
-     Check the PixelInfo struct for details. */
+     Check the RCL_PixelInfo struct for details. */
 
   if (pixel->isWall)
     color = pixel->hit.direction + 2; // give walls different colors
@@ -76,9 +81,9 @@ int main()
   RCL_initCamera(&camera); /* To initialize all parameters so that none
                               remains undefined. */
 
-  // Set the camera position to square [4;6].
-  camera.position.x = 4 * RCL_UNITS_PER_SQUARE;
-  camera.position.y = 6 * RCL_UNITS_PER_SQUARE;
+  // Set the camera position to the middle of square [2;3].
+  camera.position.x = 2 * RCL_UNITS_PER_SQUARE + RCL_UNITS_PER_SQUARE / 2;
+  camera.position.y = 3 * RCL_UNITS_PER_SQUARE + RCL_UNITS_PER_SQUARE / 2;
 
   camera.height = RCL_UNITS_PER_SQUARE;