diff --git a/src/trace.wgsl b/src/trace.wgsl
index e8fadef..53d5cf8 100644
--- a/src/trace.wgsl
+++ b/src/trace.wgsl
@@ -93,7 +93,7 @@ fn trace_fragment(in: Varying) -> vec3f {
 			}
 		}
 		if (sphere == -1) {
-			let theta = dot(ray, normalize(vec3(0., 0., 1.)));
+			let theta = dot(ray, normalize(vec3(1., 2., 1.)));
 			var env: vec3f; // in kilonits
 
 			const ILLUMINANCE_LUX = 1e5;