From df5de7730c72ebff6c78fd23aa47ebd787ce35e9 Mon Sep 17 00:00:00 2001
From: Connor McLaughlin <stenzek@gmail.com>
Date: Tue, 30 Mar 2021 01:40:04 +1000
Subject: [PATCH] GPU/HW: Disable depth buffering on transparent polygons

These are the most likely to be coplanar and cause issues.
---
 src/core/gpu_hw.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/core/gpu_hw.cpp b/src/core/gpu_hw.cpp
index b45a1601a..4a57cf4be 100644
--- a/src/core/gpu_hw.cpp
+++ b/src/core/gpu_hw.cpp
@@ -576,8 +576,10 @@ void GPU_HW::LoadVertices()
         }
         else if (g_settings.gpu_pgxp_depth_buffer)
         {
-          SetBatchDepthBuffer(true);
-          CheckForDepthClear(vertices.data(), num_vertices);
+          const bool use_depth = (m_batch.transparency_mode == GPUTransparencyMode::Disabled);
+          SetBatchDepthBuffer(use_depth);
+          if (use_depth)
+            CheckForDepthClear(vertices.data(), num_vertices);
         }
       }