diff --git a/demo1.cpp b/demo1.cpp
index 3433c8e..db365a0 100644
--- a/demo1.cpp
+++ b/demo1.cpp
@@ -11,11 +11,13 @@
 */
 
 //#define COMPUTE_WALL_TEXCOORDS 0
-  // ^ this turns off textures
+  // ^ this turns off wall textures
 
 //#define SUBSAMPLE 1
+  // ^ this turns on full X-resolution
 
 #define RCL_COMPUTE_FLOOR_TEXCOORDS 1
+  // ^ this turns on floor texture (a lot slower)
 
 // redefine some parameters
 #define FPS 255
@@ -1105,9 +1107,13 @@ int16_t intensity;
   }
   else
   {
-    color = pixel->isFloor ?
-      (pixel->height == RCL_FLOOR_TEXCOORDS_HEIGHT ? sampleImage(texture5,pixel->texCoords.x / 2,pixel->texCoords.y / 2) : HUE(1)) :
-      18;
+    color = !pixel->isFloor ?
+      18 :
+#if RCL_COMPUTE_FLOOR_TEXCOORDS == 1
+      (pixel->height == RCL_FLOOR_TEXCOORDS_HEIGHT ? sampleImage(texture5,pixel->texCoords.x / 2,pixel->texCoords.y / 2) : HUE(1));
+#else
+      HUE(10);
+#endif
 
     color = addIntensity(color,intensity);
   }
diff --git a/demo3.cpp b/demo3.cpp
index de17024..5ab609c 100644
--- a/demo3.cpp
+++ b/demo3.cpp
@@ -62,9 +62,12 @@ uint16_t changeIndex = 0;
 int16_t editCounter = 0;
 
 #define SQUARE_COLORS 4
+const uint8_t squareColors[SQUARE_COLORS] =
+  { HUE(10), HUE(8), HUE(14), HUE(15) };
+
 #define FLOOR_COLORS 8
-uint8_t squareColors[SQUARE_COLORS];
-uint8_t floorColors[FLOOR_COLORS];
+const uint8_t floorColors[FLOOR_COLORS] =
+  { HUE(2), HUE(3), HUE(10), HUE(11), HUE(1), HUE(5), HUE(6), HUE(14) };
 
 #define HEIGHT_PROFILE_LENGTH 256
 
@@ -558,20 +561,6 @@ int main()
   defaultConstraints.maxHits = 6;
   defaultConstraints.maxSteps = 20;
 
-  squareColors[0] = 179;
-  squareColors[1] = 147;
-  squareColors[2] = 130;
-  squareColors[3] = 210;
-
-  floorColors[0] = HUE(2);
-  floorColors[1] = HUE(3);
-  floorColors[2] = HUE(10);
-  floorColors[3] = HUE(11);
-  floorColors[4] = HUE(1);
-  floorColors[5] = HUE(5);
-  floorColors[6] = HUE(6);
-  floorColors[7] = HUE(14);
-
   player.setPositionSquare(4,5);
   player.mCamera.height = floorHeightAt(4,5);