diff --git a/src/inc/generator.hpp b/src/inc/generator.hpp
index 5164173..444d47a 100644
--- a/src/inc/generator.hpp
+++ b/src/inc/generator.hpp
@@ -403,126 +403,7 @@ void generate_world(world* out, unsigned int seed)
 		}
 	}
 
-	// For each vertical strip of land, start with a lighting value of 15. Go
-	// downwards, if the block is air, stay at light level 15. If not, set 
-	// everything below it to 0.
+	// Propagate skylight.
 
-	for (int x = 0; x < out->x_res; x++)
-	{
-		for (float z = 0; z < out->z_res; z++)
-		{
-			unsigned char natural = 15;
-
-			for (int y = 0; y < out->y_res; y++)
-			{
-				out->set_natural(x, y, z, natural);
-
-				if (out->get_id(x, y, z) != id_air)
-				{
-					natural = 0;
-				}
-			}
-		}
-	}
-
-	// All blocks that are of light level 0 that have one or more neighbors 
-	// that have a light level of 15 are added to the light_queue.
-
-	std::vector<std::tuple<unsigned int, unsigned int, unsigned int>> light_queue;
-
-	for (unsigned int x = 0; x < out->x_res; x++)
-	for (unsigned int y = 0; y < out->y_res; y++)
-	for (unsigned int z = 0; z < out->z_res; z++)
-	{
-		if (out->get_natural(x, y, z) == 0)
-		{
-			if 
-			(
-				out->get_natural_safe(x + 1, y, z) == 15 ||
-				out->get_natural_safe(x - 1, y, z) == 15 ||
-
-				out->get_natural_safe(x, y + 1, z) == 15 ||
-				out->get_natural_safe(x, y - 1, z) == 15 ||
-
-				out->get_natural_safe(x, y, z + 1) == 15 ||
-				out->get_natural_safe(x, y, z - 1) == 15
-			)
-			{
-				out->set_natural(x, y, z, 14);
-
-				light_queue.push_back(std::tuple<unsigned int, unsigned int, unsigned int>(x, y, z));
-			}
-		}
-	}
-
-	// Pop the top off of the queue. We'll call this the 'current block'. 
-	// Check it's six neighbors, if any of them have a light value less than 
-	// the current block's light value minus one, set that neighbors light 
-	// value to the current block's light value minus one, and add that 
-	// neighbor to the queue. Keep doing this until the queue is empty.
-
-	while (light_queue.size() > 0)
-	{
-		int x = std::get<0>(light_queue[light_queue.size() - 1]);
-		int y = std::get<1>(light_queue[light_queue.size() - 1]);
-		int z = std::get<2>(light_queue[light_queue.size() - 1]);
-
-		light_queue.pop_back();
-
-		unsigned char current_value = out->get_natural(x, y, z);
-
-		// Right neighbor.
-
-		if (out->in_bounds(x + 1, y, z) && out->get_natural(x + 1, y, z) < current_value - 1)
-		{
-			out->set_natural(x + 1, y, z, current_value - 1);
-
-			light_queue.push_back(std::tuple<unsigned int, unsigned int, unsigned int>(x + 1, y, z));
-		}
-
-		// Left neighbor.
-
-		if (out->in_bounds(x - 1, y, z) && out->get_natural(x - 1, y, z) < current_value - 1)
-		{
-			out->set_natural(x - 1, y, z, current_value - 1);
-
-			light_queue.push_back(std::tuple<unsigned int, unsigned int, unsigned int>(x - 1, y, z));
-		}
-
-		// Bottom neighbor.
-
-		if (out->in_bounds(x, y + 1, z) && out->get_natural(x, y + 1, z) < current_value - 1)
-		{
-			out->set_natural(x, y + 1, z, current_value - 1);
-
-			light_queue.push_back(std::tuple<unsigned int, unsigned int, unsigned int>(x, y + 1, z));
-		}
-
-		// Top neighbor.
-
-		if (out->in_bounds(x, y - 1, z) && out->get_natural(x, y - 1, z) < current_value - 1)
-		{
-			out->set_natural(x, y - 1, z, current_value - 1);
-
-			light_queue.push_back(std::tuple<unsigned int, unsigned int, unsigned int>(x, y - 1, z));
-		}
-
-		// Front neighbor.
-
-		if (out->in_bounds(x, y, z + 1) && out->get_natural(x, y, z + 1) < current_value - 1)
-		{
-			out->set_natural(x, y, z + 1, current_value - 1);
-
-			light_queue.push_back(std::tuple<unsigned int, unsigned int, unsigned int>(x, y, z + 1));
-		}
-
-		// Back neighbor.
-
-		if (out->in_bounds(x, y, z - 1) && out->get_natural(x, y, z - 1) < current_value - 1)
-		{
-			out->set_natural(x, y, z - 1, current_value - 1);
-
-			light_queue.push_back(std::tuple<unsigned int, unsigned int, unsigned int>(x, y, z - 1));
-		}
-	}
+	propagate_skylight(out);
 }
\ No newline at end of file