diff --git a/Assets/sunset_box/sunset_env_dynamic.shader b/Assets/sunset_box/sunset_env_dynamic.shader
index 4befe74..ca0d9f5 100644
--- a/Assets/sunset_box/sunset_env_dynamic.shader
+++ b/Assets/sunset_box/sunset_env_dynamic.shader
@@ -7,6 +7,7 @@
 		_HorizonTint ("Horizon tint", Range(0, 1)) = 0.1
 		[Header(Sun)]
 		_SunCol ("Sun color", Color) = (1.0, 0.65, 0.05, 1.0)
+		_SunAngle ("Sun angle", Range(0, 6.28)) = 0
 		_SunRadius ("Sun radius", Range(0, 0.3)) = 0.06
 		_SunCutoff ("Sun cutoff", Range(0, 0.5)) = 0.08
 		[Header(Star Layout)]
@@ -228,10 +229,7 @@
 			{
 				// float3 horizon_col = lerp(_SkyCol, _SunCol, _HorizonTint);
 				float3 origin = mul(unity_ObjectToWorld, float4(0, 0, 0, 1));
-				float3 sun_dir = (mul(unity_ObjectToWorld, float4(0, 0, -1, 1)) - origin) * float3(1, 0, 1);
-				// sun_dir.y = sin(_Time.x * 10) * 0.05;
-				sun_dir.y = 0.01;
-				sun_dir = normalize(sun_dir);
+				float3 sun_dir = float3(sin(_SunAngle), 0.0, cos(_SunAngle));
 
 				float3 dir = normalize(i.hit_pos - i.cam_pos);