diff -r 50f056aa3024 -r 0a91ea45b0e8 src/tgp.cpp
--- a/src/tgp.cpp	Fri Dec 19 01:38:09 2008 +0200
+++ b/src/tgp.cpp	Fri Dec 19 02:13:39 2008 +0200
@@ -372,8 +372,8 @@
 	int log_frequency;
 
 	/* Find first power of two that fits, so that later log_frequency == TGP_FREQUENCY_MAX in the last iteration */
-	for (log_size_min = TGP_FREQUENCY_MAX; (1U << log_size_min) < size_min; log_size_min++) { }
-	log_frequency_min = log_size_min - TGP_FREQUENCY_MAX;
+	for (log_size_min = 2; (1U << log_size_min) < size_min; log_size_min++) { }
+	log_frequency_min = log_size_min - 2;
 
 	/* Zero must be part of the iteration, else initialization will fail. */
 	assert(log_frequency_min >= 0);
@@ -383,7 +383,7 @@
 		log_frequency = iteration_round - log_frequency_min;
 		if (log_frequency >= 0) {
 			/* Apply noise for the next frequency */
-			assert(log_frequency <= TGP_FREQUENCY_MAX);
+			assert(log_frequency <= 2);
 			amplitude = _amplitudes_by_smoothness_and_frequency[_settings_game.game_creation.tgen_smoothness][log_frequency];
 		} else {
 			/* Amplitude for the low frequencies on big maps is 0, i.e. initialise with zero height */
@@ -392,7 +392,8 @@
 		continue_iteration = ApplyNoise(iteration_round, amplitude);
 		iteration_round++;
 	} while (continue_iteration);
-	assert(log_frequency == TGP_FREQUENCY_MAX);
+
+	assert(log_frequency == 2);
 }
 
 /** Returns min, max and average height from height map */
@@ -581,21 +582,25 @@
 	double max_x;
 	double max_y;
 
+    int factor = smallest_size * smallest_size / 16;
+
 	/* Lower to sea level */
 	for (y = 0; y <= _height_map.size_y; y++) {
 		/* Top right */
 		max_x = abs((perlin_coast_noise_2D(_height_map.size_y - y, y, 0.9, 53) + 0.25) * 5 + (perlin_coast_noise_2D(y, y, 0.35, 179) + 1) * 12);
-		max_x = max((smallest_size * smallest_size / 16) + max_x, (smallest_size * smallest_size / 16) + margin - max_x);
+		max_x = max(factor + max_x, factor + margin - max_x);
 		if (smallest_size < 8 && max_x > 5) max_x /= 1.5;
+        if (smallest_size < 6 && max_x > 4) max_x /= 4.0;
 		for (x = 0; x < max_x; x++) {
 			_height_map.height(x, y) = 0;
 		}
 
 		/* Bottom left */
 		max_x = abs((perlin_coast_noise_2D(_height_map.size_y - y, y, 0.85, 101) + 0.3) * 6 + (perlin_coast_noise_2D(y, y, 0.45,  67) + 0.75) * 8);
-		max_x = max((smallest_size * smallest_size / 16) + max_x, (smallest_size * smallest_size / 16) + margin - max_x);
+		max_x = max(factor + max_x, factor + margin - max_x);
 		if (smallest_size < 8 && max_x > 5) max_x /= 1.5;
-		for (x = _height_map.size_x; x > (_height_map.size_x - 1 - max_x); x--) {
+        if (smallest_size < 6 && max_x > 4) max_x /= 4.0;
+		for (x = _height_map.size_x; x > (_height_map.size_x - 1 - max_x) && x > 0; x--) {
 			_height_map.height(x, y) = 0;
 		}
 	}
@@ -604,8 +609,9 @@
 	for (x = 0; x <= _height_map.size_x; x++) {
 		/* Top left */
 		max_y = abs((perlin_coast_noise_2D(x, _height_map.size_y / 2, 0.9, 167) + 0.4) * 5 + (perlin_coast_noise_2D(x, _height_map.size_y / 3, 0.4, 211) + 0.7) * 9);
-		max_y = max((smallest_size * smallest_size / 16) + max_y, (smallest_size * smallest_size / 16) + margin - max_y);
+		max_y = max(factor + max_y, factor + margin - max_y);
 		if (smallest_size < 8 && max_y > 5) max_y /= 1.5;
+        if (smallest_size < 6 && max_y > 4) max_y /= 4.0;
 		for (y = 0; y < max_y; y++) {
 			_height_map.height(x, y) = 0;
 		}
@@ -613,9 +619,10 @@
 
 		/* Bottom right */
 		max_y = abs((perlin_coast_noise_2D(x, _height_map.size_y / 3, 0.85, 71) + 0.25) * 6 + (perlin_coast_noise_2D(x, _height_map.size_y / 3, 0.35, 193) + 0.75) * 12);
-		max_y = max((smallest_size * smallest_size / 16) + max_y, (smallest_size * smallest_size / 16) + margin - max_y);
+		max_y = max(factor + max_y, factor + margin - max_y);
 		if (smallest_size < 8 && max_y > 5) max_y /= 1.5;
-		for (y = _height_map.size_y; y > (_height_map.size_y - 1 - max_y); y--) {
+        if (smallest_size < 6 && max_y > 4) max_y /= 4.0;
+		for (y = _height_map.size_y; y > (_height_map.size_y - 1 - max_y) && y > 0; y--) {
 			_height_map.height(x, y) = 0;
 		}
 	}
@@ -711,10 +718,10 @@
 
 	HeightMapAdjustWaterLevel(water_percent, h_max_new);
 
-	//HeightMapCoastLines();
+	HeightMapCoastLines();
 	HeightMapSmoothSlopes(roughness);
 
-	//HeightMapSmoothCoasts();
+	HeightMapSmoothCoasts();
 	HeightMapSmoothSlopes(roughness);
 
 	HeightMapSineTransform(12, h_max_new);