From ec4f8ce239a6cf032961276bd582738933a255cd Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Mon, 19 Jan 2026 17:45:18 +0100
Subject: [PATCH] Optimize `RenderTargetWriteMask` on depth pass for
 transparency and terrain materials

---
 Source/Engine/Graphics/Materials/ForwardMaterialShader.cpp  | 1 +
 Source/Engine/Graphics/Materials/ParticleMaterialShader.cpp | 1 +
 Source/Engine/Graphics/Materials/TerrainMaterialShader.cpp  | 1 +
 3 files changed, 3 insertions(+)

diff --git a/Source/Engine/Graphics/Materials/ForwardMaterialShader.cpp b/Source/Engine/Graphics/Materials/ForwardMaterialShader.cpp
index d8d986163..f3924f431 100644
--- a/Source/Engine/Graphics/Materials/ForwardMaterialShader.cpp
+++ b/Source/Engine/Graphics/Materials/ForwardMaterialShader.cpp
@@ -185,6 +185,7 @@ bool ForwardMaterialShader::Load()
     psDesc.DepthWriteEnable = true;
     psDesc.DepthEnable = true;
     psDesc.DepthFunc = ComparisonFunc::Less;
+    psDesc.BlendMode.RenderTargetWriteMask = BlendingMode::ColorWrite::None;
     psDesc.HS = nullptr;
     psDesc.DS = nullptr;
     psDesc.VS = _shader->GetVS("VS");
diff --git a/Source/Engine/Graphics/Materials/ParticleMaterialShader.cpp b/Source/Engine/Graphics/Materials/ParticleMaterialShader.cpp
index a2c45a6ee..b0ad6217c 100644
--- a/Source/Engine/Graphics/Materials/ParticleMaterialShader.cpp
+++ b/Source/Engine/Graphics/Materials/ParticleMaterialShader.cpp
@@ -253,6 +253,7 @@ bool ParticleMaterialShader::Load()
     psDesc = GPUPipelineState::Description::Default;
     psDesc.CullMode = CullMode::TwoSided;
     psDesc.DepthClipEnable = false;
+    psDesc.BlendMode.RenderTargetWriteMask = BlendingMode::ColorWrite::None;
     psDesc.PS = _shader->GetPS("PS_Depth");
     psDesc.VS = vsSprite;
     _cacheSprite.Depth.Init(psDesc);
diff --git a/Source/Engine/Graphics/Materials/TerrainMaterialShader.cpp b/Source/Engine/Graphics/Materials/TerrainMaterialShader.cpp
index b6b455f20..8a28ab168 100644
--- a/Source/Engine/Graphics/Materials/TerrainMaterialShader.cpp
+++ b/Source/Engine/Graphics/Materials/TerrainMaterialShader.cpp
@@ -191,6 +191,7 @@ bool TerrainMaterialShader::Load()
     psDesc.DepthWriteEnable = true;
     psDesc.DepthEnable = true;
     psDesc.DepthFunc = ComparisonFunc::Less;
+    psDesc.BlendMode.RenderTargetWriteMask = BlendingMode::ColorWrite::None;
     psDesc.HS = nullptr;
     psDesc.DS = nullptr;
     psDesc.PS = nullptr;