From 6041c48fbedb3b02e38ecdc9ef01c0f1c320a29a Mon Sep 17 00:00:00 2001
From: Vincent Lejeune <vljn@ovi.com>
Date: Sun, 7 Dec 2014 21:37:16 +0100
Subject: [PATCH] Source DiffuseIBL algorithm

---
 data/shaders/utils/DiffuseIBL.frag | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/data/shaders/utils/DiffuseIBL.frag b/data/shaders/utils/DiffuseIBL.frag
index 0d4d14194..a581514e9 100644
--- a/data/shaders/utils/DiffuseIBL.frag
+++ b/data/shaders/utils/DiffuseIBL.frag
@@ -1,3 +1,7 @@
+// From "An Efficient Representation for Irradiance Environment Maps" article
+// See http://graphics.stanford.edu/papers/envmap/
+
+// Coefficients are calculated in IBL.cpp
 uniform float blueLmn[9];
 uniform float greenLmn[9];
 uniform float redLmn[9];