From de3081042e93cf806ad8a28b71c98576ea2de80e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Sun, 7 Oct 2018 19:39:19 +0200
Subject: [PATCH] Shaders: avoid overflowing alpha with multiple lights.

Still not sure what the proper semantics of light alpha should be.
---
 src/Magnum/Shaders/Phong.frag | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Magnum/Shaders/Phong.frag b/src/Magnum/Shaders/Phong.frag
index e9c6afc89..a7a37debb 100644
--- a/src/Magnum/Shaders/Phong.frag
+++ b/src/Magnum/Shaders/Phong.frag
@@ -155,7 +155,7 @@ void main() {
     for(int i = 0; i < LIGHT_COUNT; ++i) {
         highp vec3 normalizedLightDirection = normalize(lightDirections[i]);
         lowp float intensity = max(0.0, dot(normalizedTransformedNormal, normalizedLightDirection));
-        color += vec4(finalDiffuseColor.rgb*lightColors[i].rgb*intensity, lightColors[i].a*finalDiffuseColor.a);
+        color += vec4(finalDiffuseColor.rgb*lightColors[i].rgb*intensity, lightColors[i].a*finalDiffuseColor.a/float(LIGHT_COUNT));
 
         /* Add specular color, if needed */
         if(intensity > 0.001) {