From 72e5a89778c230d7520da5ae3d0e448260808a33 Mon Sep 17 00:00:00 2001
From: baldurk <baldurk@baldurk.org>
Date: Wed, 11 Feb 2026 13:26:31 +0000
Subject: [PATCH] Fix backwards check for value of BaseVertex SPIR-V builtin

---
 renderdoc/driver/vulkan/vk_postvs.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/renderdoc/driver/vulkan/vk_postvs.cpp b/renderdoc/driver/vulkan/vk_postvs.cpp
index 70b9311a4..ed38f7d7b 100644
--- a/renderdoc/driver/vulkan/vk_postvs.cpp
+++ b/renderdoc/driver/vulkan/vk_postvs.cpp
@@ -1109,12 +1109,12 @@ static void ConvertToMeshOutputCompute(const ShaderReflection &refl, const SPIRV
           {
             if(action->flags & ActionFlags::Indexed)
             {
-              valueID = editor.AddConstantImmediate<uint32_t>(action->vertexOffset);
+              valueID = editor.AddConstantImmediate<uint32_t>(action->baseVertex);
+              compType = CompType::SInt;
             }
             else
             {
-              valueID = editor.AddConstantImmediate<int32_t>(action->baseVertex);
-              compType = CompType::SInt;
+              valueID = editor.AddConstantImmediate<int32_t>(action->vertexOffset);
             }
           }
           else if(builtin == ShaderBuiltin::BaseInstance)