diff --git a/src/org/oscim/renderer/layer/ExtrusionLayer.java b/src/org/oscim/renderer/layer/ExtrusionLayer.java
index 0da03cc7..91e8a7a1 100644
--- a/src/org/oscim/renderer/layer/ExtrusionLayer.java
+++ b/src/org/oscim/renderer/layer/ExtrusionLayer.java
@@ -85,11 +85,12 @@ public class ExtrusionLayer extends Layer {
 		float height = way.height;
 		float minHeight = way.minHeight;
 
-		// just a guessing to make it look ok
+		// 12m default
 		if (height == 0)
-			height = 14 * 100;
+			height = 12 * 100;
 
-		float sfactor = (400f / Tile.TILE_SIZE) / 2f;
+		// 5 cm steps
+		float sfactor = (400f / Tile.TILE_SIZE) / 5f;
 		height *= sfactor;
 		minHeight *= sfactor;
 
diff --git a/src/org/oscim/renderer/overlays/ExtrusionOverlay.java b/src/org/oscim/renderer/overlays/ExtrusionOverlay.java
index 166cafe3..84a788a9 100644
--- a/src/org/oscim/renderer/overlays/ExtrusionOverlay.java
+++ b/src/org/oscim/renderer/overlays/ExtrusionOverlay.java
@@ -331,7 +331,7 @@ public class ExtrusionOverlay extends RenderOverlay {
 		m.mvp.setTransScale(x * scale, y * scale, scale / GLRenderer.COORD_SCALE);
 
 		// scale height
-		m.mvp.setValue(10, scale / 30);
+		m.mvp.setValue(10, scale / 10);
 
 		m.mvp.multiplyMM(m.viewproj, m.mvp);