Shift baseline to +10 voxels

assets/index.html

@@ -42,7 +42,7 @@
 
     function getHeight(x, y) {
         var n = perlin2D(x * 0.02, y * 0.02, 4);
-        return Math.round(n * 5);
+        return 10 + Math.round(n * 5);
     }
 
     function fade(t) {
@@ -91,7 +91,7 @@
     }
 
     function isWater(h) {
-        return h <= -2;
+        return h <= 8;
     }
 
     var tiles = [];