diff --git a/src/world/tasks.rs b/src/world/tasks.rs
index 6570829..61a1c8d 100644
--- a/src/world/tasks.rs
+++ b/src/world/tasks.rs
@@ -1,6 +1,7 @@
 use flume::{Sender, Receiver};
 use glam::IVec3;
 use shipyard::Unique;
+use rayon::{ThreadPool, ThreadPoolBuilder};
 use super::{
   chunk::BlockData,
   render::ChunkVertex, 
@@ -33,16 +34,18 @@ pub enum ChunkTaskResponse {
 #[derive(Unique)]
 pub struct ChunkTaskManager {
   channel: (Sender<ChunkTaskResponse>, Receiver<ChunkTaskResponse>),
+  pool: ThreadPool,
 }
 impl ChunkTaskManager {
   pub fn new() -> Self {
     Self {
       channel: flume::unbounded::<ChunkTaskResponse>(), //maybe put a bound or even bound(0)?
+      pool: ThreadPoolBuilder::new().num_threads(4).build().unwrap()
     }
   }
   pub fn spawn_task(&self, task: ChunkTask) {
     let sender = self.channel.0.clone();
-    rayon::spawn(move || {
+    self.pool.spawn(move || {
       let _ = sender.send(match task {
         ChunkTask::GenerateMesh { position, data } => {
           let (vertices, indexes) = generate_mesh(data);
diff --git a/src/world/worldgen.rs b/src/world/worldgen.rs
index c40716e..deac50a 100644
--- a/src/world/worldgen.rs
+++ b/src/world/worldgen.rs
@@ -18,7 +18,7 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> BlockData {
       for z in 0..CHUNK_SIZE {
         let position = ivec3(x as i32, y as i32, z as i32) + offset;
         let noise = noise.get_noise3d(position.x as f32, position.y as f32, position.z as f32);
-        if noise > 0.8 {
+        if (0.7..0.8).contains(&noise) {
           blocks[x][y][z] = Block::Stone;
         }
       }