diff --git a/Core/Game.cs b/Core/Game.cs
index 0c0096d..f0a0a5e 100644
--- a/Core/Game.cs
+++ b/Core/Game.cs
@@ -116,6 +116,9 @@ public sealed class Game : GameWindow
         this._shader.SetMatrix4("view", this._player.Camera.GetViewMatrix());
         this._shader.SetMatrix4("projection", this._player.Camera.GetProjectionMatrix());
         this._shader.SetInt("atlas", 0);
+        this._shader.SetFloat("u_caveDarkStartY",    this._cfg.CaveDarkStartY);
+        this._shader.SetFloat("u_caveDarkEndY",      this._cfg.CaveDarkEndY);
+        this._shader.SetFloat("u_caveMinBrightness", this._cfg.CaveMinBrightness);
         this._texture.Use(TextureUnit.Texture0);
 
         this._streamer.DrawAll((pos, renderer) =>