From 3e83fd441d84617855dfdcfab50fd8f4fb041f00 Mon Sep 17 00:00:00 2001
From: Brecht Van Lommel <brechtvanlommel@pandora.be>
Date: Fri, 18 May 2012 12:49:22 +0000
Subject: [PATCH] Fix #31486: cycles texture coordinate reflection output has
 wrong direction.

---
 intern/cycles/kernel/svm/svm_tex_coord.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/intern/cycles/kernel/svm/svm_tex_coord.h b/intern/cycles/kernel/svm/svm_tex_coord.h
index aa924bcc38b..9952557d614 100644
--- a/intern/cycles/kernel/svm/svm_tex_coord.h
+++ b/intern/cycles/kernel/svm/svm_tex_coord.h
@@ -87,7 +87,7 @@ __device void svm_node_tex_coord(KernelGlobals *kg, ShaderData *sd, float *stack
 		}
 		case NODE_TEXCO_REFLECTION: {
 			if(sd->object != ~0)
-				data = sd->I - 2.0f*dot(sd->N, sd->I)*sd->N;
+				data = 2.0f*dot(sd->N, sd->I)*sd->N - sd->I;
 			else
 				data = sd->I;
 			break;
@@ -136,7 +136,7 @@ __device void svm_node_tex_coord_bump_dx(KernelGlobals *kg, ShaderData *sd, floa
 		}
 		case NODE_TEXCO_REFLECTION: {
 			if(sd->object != ~0)
-				data = sd->I - 2.0f*dot(sd->N, sd->I)*sd->N;
+				data = 2.0f*dot(sd->N, sd->I)*sd->N - sd->I;
 			else
 				data = sd->I;
 			break;
@@ -188,7 +188,7 @@ __device void svm_node_tex_coord_bump_dy(KernelGlobals *kg, ShaderData *sd, floa
 		}
 		case NODE_TEXCO_REFLECTION: {
 			if(sd->object != ~0)
-				data = sd->I - 2.0f*dot(sd->N, sd->I)*sd->N;
+				data = 2.0f*dot(sd->N, sd->I)*sd->N - sd->I;
 			else
 				data = sd->I;
 			break;