From f11d7dee213ee55bd9bd289eeb8cc827979e882a Mon Sep 17 00:00:00 2001
From: Stefan Gustavson <stefan.gustavson@gmail.com>
Date: Tue, 29 Jun 2021 11:03:51 +0200
Subject: [PATCH] New permutation (much improved randomness)

---
 src/psrdnoise2D.glsl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/psrdnoise2D.glsl b/src/psrdnoise2D.glsl
index 9b630fb..9263b42 100644
--- a/src/psrdnoise2D.glsl
+++ b/src/psrdnoise2D.glsl
@@ -74,7 +74,7 @@ vec3 mod289(vec3 x) {
 
 // Permutation polynomial (ring size 289 = 17*17)
 vec3 permute(vec3 x) {
-  return mod289(((x*34.0)+1.0)*x);
+  return mod289(((x*34.0)+6.0)*x);
 }
 
 // Hashed 2-D gradients with an extra rotation.