From 08949f94ea2763a439fd847e9a6b9a1d9ed4c73a Mon Sep 17 00:00:00 2001
From: Miguel Pozo <pragma37@gmail.com>
Date: Sat, 13 Jul 2024 17:07:27 +0200
Subject: [PATCH] Fix backfacing AO

---
 .../NPR_Pipeline/Shaders/NPR_Pipeline/NPR_Filters.glsl          | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Malt/Pipelines/NPR_Pipeline/Shaders/NPR_Pipeline/NPR_Filters.glsl b/Malt/Pipelines/NPR_Pipeline/Shaders/NPR_Pipeline/NPR_Filters.glsl
index 01af7d8d..4f8694ff 100644
--- a/Malt/Pipelines/NPR_Pipeline/Shaders/NPR_Pipeline/NPR_Filters.glsl
+++ b/Malt/Pipelines/NPR_Pipeline/Shaders/NPR_Pipeline/NPR_Filters.glsl
@@ -29,7 +29,7 @@ float ao(int samples, float radius, float distribution_exponent, float contrast,
         vec3 normal = NORMAL;
         #ifdef IS_MESH_SHADER
         {
-            normal = IO_NORMAL;
+            normal = is_front_facing() ? IO_NORMAL : -IO_NORMAL;
         }
         #endif
         float ao = ao(IN_NORMAL_DEPTH, 3, POSITION, normal, samples, radius, distribution_exponent, bias);