From 4867bb2e2b8904965d9ca4f887e690f5714ab8e2 Mon Sep 17 00:00:00 2001
From: RedBlackAka <140876408+RedBlackAka@users.noreply.github.com>
Date: Sat, 30 May 2026 23:53:16 +0200
Subject: [PATCH] video_core: Change unimplemented gas stub behaviour for
 Vulkan (#2165)

---
 src/video_core/shader/generator/spv_fs_shader_gen.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/video_core/shader/generator/spv_fs_shader_gen.cpp b/src/video_core/shader/generator/spv_fs_shader_gen.cpp
index 93ab3e367..48a1f9a61 100644
--- a/src/video_core/shader/generator/spv_fs_shader_gen.cpp
+++ b/src/video_core/shader/generator/spv_fs_shader_gen.cpp
@@ -72,6 +72,7 @@ void FragmentModule::Generate() {
         break;
     case TexturingRegs::FogMode::Gas:
         WriteGas();
+        // Return early due to unimplemented gas mode
         return;
     default:
         break;
@@ -196,7 +197,12 @@ void FragmentModule::WriteFog() {
 void FragmentModule::WriteGas() {
     // TODO: Implement me
     LOG_CRITICAL(Render, "Unimplemented gas mode");
-    OpKill();
+    // Replace the output color with a transparent pixel,
+    // (just discarding the pixel causes graphical issues
+    // in some MH games).
+    OpStore(color_id, ConstF32(0.f, 0.f, 0.f, 0.f));
+
+    OpReturn();
     OpFunctionEnd();
 }