diff --git a/worldgen-c/bin/worldgen b/worldgen-c/bin/worldgen
index 8adb09c..a705f9a 100755
Binary files a/worldgen-c/bin/worldgen and b/worldgen-c/bin/worldgen differ
diff --git a/worldgen-c/src/worldgen.c b/worldgen-c/src/worldgen.c
index f69c0a6..d46b995 100644
--- a/worldgen-c/src/worldgen.c
+++ b/worldgen-c/src/worldgen.c
@@ -693,6 +693,19 @@ static int raw_column_height(worldgen_ctx *ctx, int x, int z) {
 		height = height * (1.0 - plains_blend) + plains_target * plains_blend;
 	}
 
+	double above_water = height - (double)ctx->sea_level;
+	if (above_water > -1.5 && above_water < 24.0) {
+		double island_mask = smoothstep01((above_water + 1.5) / 6.0) * (1.0 - smoothstep01((above_water - 12.0) / 12.0));
+		island_mask *= 1.0 - build_flats * 0.7;
+		double rolling = simplex_noise2(&ctx->noise, (warp2_x + 76000) * 0.0045, (warp2_z - 76000) * 0.0045) * 3.2;
+		rolling += simplex_noise2(&ctx->noise, (warp2_x - 83000) * 0.013, (warp2_z + 83000) * 0.013) * 1.4;
+		double mound = simplex_noise2(&ctx->noise, (warp2_x + 91000) * 0.021, (warp2_z - 91000) * 0.021) * 0.5 + 0.5;
+		rolling += mound * mound * 2.0;
+		double coastal_mask = (1.0 - smoothstep01((above_water - 1.0) / 5.0)) * smoothstep01((above_water + 1.0) / 3.0);
+		double dune = fabs(simplex_noise2(&ctx->noise, (warp2_x - 47000) * 0.028, (warp2_z + 47000) * 0.028)) * 2.2;
+		height += (rolling * island_mask) + (dune * coastal_mask * (1.0 - build_flats * 0.85));
+	}
+
 	return (int)height;
 }