From bb8373fad5b87eba90cb19c34d7e71f4787542c8 Mon Sep 17 00:00:00 2001
From: numzero <numzer0@yandex.ru>
Date: Sun, 16 Nov 2025 18:04:18 +0300
Subject: [PATCH] optimize summation

---
 src/lib.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 457a3f1..9ae7d9d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -257,6 +257,9 @@ impl Core {
 			let mut value = 0.0f32;
 			for light_hit in &hits {
 				let d2 = hit.base.distance_squared(light_hit.base);
+				if d2 > 3. * sigma2 {
+					continue;
+				}
 				let w = (-0.5 * d2 / sigma2).exp();
 				value += w;
 			}