diff --git a/core/src/zero1hd/polyjet/ui/stages/GamePlayArea.java b/core/src/zero1hd/polyjet/ui/stages/GamePlayArea.java
index ec18b24..fab8d50 100755
--- a/core/src/zero1hd/polyjet/ui/stages/GamePlayArea.java
+++ b/core/src/zero1hd/polyjet/ui/stages/GamePlayArea.java
@@ -32,9 +32,12 @@ public class GamePlayArea extends Stage {
 	private int score;
 	
 	private ShaderProgram invert;
+	private ShaderProgram bgShader;
 	
 	private Texture background;
 	
+	private float time;
+	
 	public GamePlayArea(AssetManager assetManager, Preferences prefs) {
 		super(new FitViewport(Polyjet.GAME_AREA_WIDTH, Polyjet.GAME_AREA_HEIGHT));
 		Gdx.app.debug("Game Area", "new area created");
@@ -48,6 +51,7 @@ public class GamePlayArea extends Stage {
 	}
 	
 	public void setAudioMap(GamePlayMap audioMap) {
+		time = 0;
 		this.audioMap = audioMap;
 	}
 	
@@ -71,6 +75,23 @@ public class GamePlayArea extends Stage {
 			
 		}
 		
+		if (prefs.getBoolean("bg shader")) {
+			Gdx.app.debug("Shader", "using background shader");
+			
+			bgShader = new ShaderProgram(Gdx.files.internal("shaders/star_vert.glsl").readString(), Gdx.files.internal("shaders/star_frag.glsl").readString());
+			
+			if (!bgShader.isCompiled()) {
+				System.err.println(bgShader.getLog());
+				System.exit(0);
+			}
+			if (bgShader.getLog().length()!=0) {
+				System.out.println(bgShader.getLog());
+			}
+			
+		} else {
+			//TODO prepare background rendering without shader
+		}
+		
 		ShaderProgram.pedantic = false;
 	}
 	
@@ -78,8 +99,18 @@ public class GamePlayArea extends Stage {
 	public void draw() {
 		//TODO batch draw background
 		getBatch().begin();
+		
+		if (bgShader != null) {
+			getBatch().setShader(bgShader);
+			bgShader.setUniformf("resolution", background.getWidth(), background.getHeight());
+			bgShader.setUniformf("time", time);
+		}
 		getBatch().draw(background, 0f, 0f, Polyjet.GAME_AREA_WIDTH, Polyjet.GAME_AREA_HEIGHT);
 		getBatch().end();
+		
+		
+		
+		getBatch().setShader(null);
 		super.draw();
 	}
 	
@@ -88,6 +119,7 @@ public class GamePlayArea extends Stage {
 		MapWindowData mwd;
 		if (audioMap != null && audioMap.getPlayableClip().isPlaying()) {
 			audioMap.getMusicData().readIndexUpdate();
+			time = audioMap.getPlayableClip().getPosition();
 			if ((mwd = audioMap.nextWindowData()) != null) {
 				EntitySpawnInfo[] currentSpawnInfo = mwd.getArray();
 				if (currentSpawnInfo != null) {