From 51914d4a4ada5288d8ab30330e707f72d1073d1d Mon Sep 17 00:00:00 2001
From: Jeroen Bakker <jeroen@blender.org>
Date: Wed, 16 Nov 2022 12:53:10 +0100
Subject: [PATCH] Fix T100530: Drawing arifacts Volume/AMD.

Missing initialization of global shader variable.
Most drivers initialize these by them selves, but not all of them.
---
 source/blender/draw/engines/eevee/shaders/volumetric_frag.glsl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/blender/draw/engines/eevee/shaders/volumetric_frag.glsl b/source/blender/draw/engines/eevee/shaders/volumetric_frag.glsl
index 90c36801dd5..a98ff4b1842 100644
--- a/source/blender/draw/engines/eevee/shaders/volumetric_frag.glsl
+++ b/source/blender/draw/engines/eevee/shaders/volumetric_frag.glsl
@@ -20,7 +20,7 @@ layout(location = 1) out vec4 volumeExtinction;
 layout(location = 2) out vec4 volumeEmissive;
 layout(location = 3) out vec4 volumePhase;
 
-int attr_id;
+int attr_id = 0;
 
 #ifndef CLEAR
 GlobalData init_globals(void)