From 71317b8579385142c2a1cbad70a68cf661408855 Mon Sep 17 00:00:00 2001
From: Dmitry Kostenko <codeforsmile@gmail.com>
Date: Sat, 22 Jan 2022 17:18:27 +0100
Subject: [PATCH] Make sure nightRatio is always greater than zero.

To avoid underfined behavior of GLSL pow()
---
 client/shaders/nodes_shader/opengl_fragment.glsl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/client/shaders/nodes_shader/opengl_fragment.glsl b/client/shaders/nodes_shader/opengl_fragment.glsl
index 9ee88eb39..762a676c6 100644
--- a/client/shaders/nodes_shader/opengl_fragment.glsl
+++ b/client/shaders/nodes_shader/opengl_fragment.glsl
@@ -512,7 +512,7 @@ void main(void)
 	// turns out that nightRatio falls off much faster than
 	// actual brightness of artificial light in relation to natual light.
 	// Power ratio was measured on torches in MTG (brightness = 14).
-	float adjusted_night_ratio = pow(nightRatio, 0.6);
+	float adjusted_night_ratio = pow(max(0.0, nightRatio), 0.6);
 
 	if (f_normal_length != 0 && cosLight < 0.035) {
 		shadow_int = max(shadow_int, 1 - clamp(cosLight, 0.0, 0.035)/0.035);