From 91c946cfbd039ce8c3c19da831e6801db88d67c6 Mon Sep 17 00:00:00 2001
From: prideout <philiprideout@gmail.com>
Date: Fri, 18 Jan 2019 13:08:45 -0800
Subject: [PATCH] Add workaround for depth invariance on NVIDIA.

Fixes #645.
---
 shaders/src/depth_main.vs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/shaders/src/depth_main.vs b/shaders/src/depth_main.vs
index 9ddd6c861e..662dfed2e6 100644
--- a/shaders/src/depth_main.vs
+++ b/shaders/src/depth_main.vs
@@ -1,9 +1,14 @@
+// The sole purpose of this no-op function is to improve parity between the depth vertex shader
+// and color vertex shader, thus working around a variance issue seen with NVIDIA drivers.
+void materialVertex(inout MaterialVertexInputs m) { }
+
 void main() {
 #if defined(VERTEX_DOMAIN_DEVICE)
     gl_Position = getSkinnedPosition();
 #else
     MaterialVertexInputs material;
     initMaterialVertex(material);
+    materialVertex(material);
     gl_Position = getClipFromWorldMatrix() * material.worldPosition;
 #endif