diff --git a/DSfix.vcxproj b/DSfix.vcxproj
index ce32a8a..346d85e 100644
--- a/DSfix.vcxproj
+++ b/DSfix.vcxproj
@@ -251,6 +251,7 @@
       <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">WIN32;NDEBUG;_WINDOWS;_MBCS;_USRDLL</PreprocessorDefinitions>
       <PreprocessorDefinitions Condition="'$(Configuration)|$(Platform)'=='Release|x64'">WIN32;NDEBUG;_WINDOWS;_MBCS;_USRDLL</PreprocessorDefinitions>
     </ClCompile>
+    <ClCompile Include="d3d9query.cpp" />
     <ClCompile Include="d3dutil.cpp" />
     <ClCompile Include="Detouring.cpp" />
     <ClCompile Include="dinputWrapper.cpp" />
@@ -313,6 +314,7 @@
   <ItemGroup>
     <ClInclude Include="AreaTex.h" />
     <ClInclude Include="d3d9.h" />
+    <ClInclude Include="d3d9query.h" />
     <ClInclude Include="d3dutil.h" />
     <ClInclude Include="Detouring.h" />
     <ClInclude Include="dinput.h" />
diff --git a/RenderstateManager.cpp b/RenderstateManager.cpp
index 634fe1a..66775d9 100644
--- a/RenderstateManager.cpp
+++ b/RenderstateManager.cpp
@@ -1,5 +1,6 @@
 #include "RenderstateManager.h"
 
+#include <atlbase.h>
 #include <time.h>
 #include <intsafe.h>
 #include <io.h>
@@ -15,15 +16,28 @@
 
 RSManager RSManager::instance;
 
-static const char *PIXEL_SHADER_DUMP_DIR = "dsfix/pixelshader_dump";
-static const char *PIXEL_SHADER_OVERRIDE_DIR = "dsfix/pixelshader_override";
-static const char *VERTEX_SHADER_DUMP_DIR = "dsfix/vertexshader_dump";
-static const char *VERTEX_SHADER_OVERRIDE_DIR = "dsfix/vertexshader_override";
+namespace {
+	const char *PIXEL_SHADER_DUMP_DIR = "dsfix/pixelshader_dump";
+	const char *PIXEL_SHADER_OVERRIDE_DIR = "dsfix/pixelshader_override";
+	const char *VERTEX_SHADER_DUMP_DIR = "dsfix/vertexshader_dump";
+	const char *VERTEX_SHADER_OVERRIDE_DIR = "dsfix/vertexshader_override";
+
+	unsigned getDOFResolution() {
+		unsigned setting = Settings::get().getDOFOverrideResolution();
+		if (setting == 0) {
+			return 360;
+		} else {
+			return setting;
+		}
+	}
+}
 
 void RSManager::initResources() {
 	SDLOG(0, "RenderstateManager resource initialization started\n");
 	unsigned rw = Settings::get().getRenderWidth(), rh = Settings::get().getRenderHeight();
-	unsigned dofRes = Settings::get().getDOFOverrideResolution();
+	haveOcclusionScale = false;
+	occlusionScale = 1;
+	unsigned dofRes = getDOFResolution();
 	if(Settings::get().getAAQuality()) {
 		if(Settings::get().getAAType() == "SMAA") {
 			smaa = new SMAA(d3ddev, rw, rh, (SMAA::Preset)(Settings::get().getAAQuality()-1));
@@ -278,6 +292,9 @@ HRESULT RSManager::redirectSetRenderTarget(DWORD RenderTargetIndex, IDirect3DSur
 		// store it for later use
 		mainRT = pRenderTarget;
 		SDLOG(0, "Storing RT as main RT: %p\n", mainRT);
+		if (!haveOcclusionScale) {
+			measureOcclusionScale();
+		}
 	}
 
 	if(nrts == 11) { // we are switching to the RT used to store the Z value in the 24 RGB bits (among other things)
@@ -430,6 +447,147 @@ HRESULT RSManager::redirectSetRenderTarget(DWORD RenderTargetIndex, IDirect3DSur
 	return d3ddev->SetRenderTarget(RenderTargetIndex, pRenderTarget);
 }
 
+// Measure the occlusion query result of drawing a square of a known
+// size.
+//
+// The result is affected by the rendering resolution which is
+// known, but might also be affected by driver-enforced antialiasing.
+// This result is used to scale the result of further occlusion
+// queries into the expected range of values.
+void RSManager::measureOcclusionScale() {
+	static const D3DVERTEXELEMENT9 vertexElements[2] = {
+		{ 0, 0,  D3DDECLTYPE_FLOAT3, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_POSITION, 0 },
+		D3DDECL_END()
+	};
+	CComPtr<IDirect3DVertexDeclaration9> vertexDeclaration;
+	CComPtr<ID3DXBuffer> errorBuffer;
+	static const char vertexShaderSource[] = "vs_3_0 \n dcl_position v0 \n dcl_position o0 \n mov o0, v0";
+	CComPtr<ID3DXBuffer> vertexShaderBuffer;
+	CComPtr<IDirect3DVertexShader9> vertexShader;
+	static const char pixelShaderSource[] = "ps_3_0 \n def c0, 0, 0, 0, 0 \n mov_pp oC0, c0.x";
+	CComPtr<ID3DXBuffer> pixelShaderBuffer;
+	CComPtr<IDirect3DPixelShader9> pixelShader;
+	CComPtr<IDirect3DQuery9> query;
+	DWORD pixelsVisible = 0;
+	HRESULT hr;
+
+	haveOcclusionScale = true;
+
+	float width = 24.0 / 1024;
+	float height = 24.0 / 720;
+	const float vertexData[4][3] = {
+		{ -width, -height, 0.5 },
+		{  width, -height, 0.5 },
+		{  width,  height, 0.5 },
+		{ -width,  height, 0.5 },
+	};
+
+	if (FAILED(d3ddev->Clear(0, nullptr, D3DCLEAR_TARGET, 0, 1, 0))) {
+		SDLOG(0, "measureOcclusionScale: Clear failed\n");
+		return;
+	}
+
+	if (FAILED(d3ddev->SetRenderState(D3DRS_ZENABLE, D3DZB_TRUE))) {
+		SDLOG(0, "measureOcclusionScale: SetRenderState ZENABLE failed\n");
+		return;
+	}
+
+	if (FAILED(d3ddev->SetRenderState(D3DRS_ZFUNC, D3DCMP_LESSEQUAL))) {
+		SDLOG(0, "measureOcclusionScale: SetRenderState ZFUNC failed\n");
+		return;
+	}
+
+	if (FAILED(d3ddev->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE))) {
+		SDLOG(0, "measureOcclusionScale: SetRenderState CULLMODE failed\n");
+		return;
+	}
+
+	if (FAILED(d3ddev->CreateVertexDeclaration(vertexElements, &vertexDeclaration))) {
+		SDLOG(0, "measureOcclusionScale: CreateVertexDeclaration failed\n");
+		return;
+	}
+
+	if (FAILED(d3ddev->SetVertexDeclaration(vertexDeclaration))) {
+		SDLOG(0, "measureOcclusionScale: SetVertexDeclaration failed\n");
+		return;
+	}
+
+	if (FAILED(D3DXAssembleShader(vertexShaderSource, sizeof(vertexShaderSource), nullptr, nullptr, 0, &vertexShaderBuffer, &errorBuffer))) {
+		SDLOG(0, "measureOcclusionScale: D3DXAssembleShader failed:\n%s\n", errorBuffer->GetBufferPointer());
+		return;
+	}
+
+	if (FAILED(d3ddev->CreateVertexShader(reinterpret_cast<const DWORD*>(vertexShaderBuffer->GetBufferPointer()), &vertexShader))) {
+		SDLOG(0, "measureOcclusionScale: CreateVertexShader failed\n");
+		return;
+	}
+
+	if (FAILED(d3ddev->SetVertexShader(vertexShader))) {
+		SDLOG(0, "measureOcclusionScale: SetVertexShader failed\n");
+		return;
+	}
+
+	if (FAILED(D3DXAssembleShader(pixelShaderSource, sizeof(pixelShaderSource), nullptr, nullptr, 0, &pixelShaderBuffer, &errorBuffer))) {
+		SDLOG(0, "measureOcclusionScale: D3DXAssembleShader failed:\n%s\n", errorBuffer->GetBufferPointer());
+		return;
+	}
+
+	if (FAILED(d3ddev->CreatePixelShader(reinterpret_cast<const DWORD*>(pixelShaderBuffer->GetBufferPointer()), &pixelShader))) {
+		SDLOG(0, "measureOcclusionScale: CreatePixelShader failed\n");
+		return;
+	}
+
+	if (FAILED(d3ddev->SetPixelShader(pixelShader))) {
+		SDLOG(0, "measureOcclusionScale: SetPixelShader failed\n");
+		return;
+	}
+
+	if (FAILED(d3ddev->CreateQuery(D3DQUERYTYPE_OCCLUSION, &query))) {
+		SDLOG(0, "measureOcclusionScale: CreateQuery failed\n");
+		return;
+	}
+
+	if (FAILED(d3ddev->BeginScene())) {
+		SDLOG(0, "measureOcclusionScale: BeginScene failed\n");
+		return;
+	}
+
+	if (FAILED(query->Issue(D3DISSUE_BEGIN))) {
+		SDLOG(0, "measureOcclusionScale: Issue BEGIN failed\n");
+		return;
+	}
+
+	if (FAILED(d3ddev->DrawPrimitiveUP(D3DPT_TRIANGLEFAN, 2, vertexData, sizeof(vertexData[0])))) {
+		SDLOG(0, "measureOcclusionScale: DrawPrimitiveUP failed\n");
+		return;
+	}
+
+	if (FAILED(query->Issue(D3DISSUE_END))) {
+		SDLOG(0, "measureOcclusionScale: Issue END failed\n");
+		return;
+	}
+
+	while ((hr = query->GetData(&pixelsVisible, sizeof(pixelsVisible), D3DGETDATA_FLUSH)) == S_FALSE);
+	if (FAILED(hr)) {
+		SDLOG(0, "measureOcclusionScale: GetData failed\n");
+		return;
+	}
+
+	if (pixelsVisible == 0) {
+		occlusionScale = 1;
+	} else {
+		occlusionScale = pixelsVisible / 576.0;
+	}
+
+	SDLOG(2, "measureOcclusionScale: pixelsVisible = %d\n", pixelsVisible);
+	SDLOG(2, "measureOcclusionScale: occlusionScale = %f\n", occlusionScale);
+
+	if (FAILED(d3ddev->EndScene())) {
+		SDLOG(0, "measureOcclusionScale: EndScene failed\n");
+		return;
+	}
+}
+
 HRESULT RSManager::redirectStretchRect(IDirect3DSurface9* pSourceSurface, CONST RECT* pSourceRect, IDirect3DSurface9* pDestSurface, CONST RECT* pDestRect, D3DTEXTUREFILTERTYPE Filter) {
 	//SurfSurfMap::iterator it = renderTexSurfTargets.find(pSourceSurface);
 	//if(it != renderTexSurfTargets.end()) {
@@ -581,7 +739,7 @@ void RSManager::reloadScao() {
 
 void RSManager::reloadGauss() {
 	SAFEDELETE(gauss); 
-	gauss = new GAUSS(d3ddev, Settings::get().getDOFOverrideResolution()*16/9, Settings::get().getDOFOverrideResolution());
+	gauss = new GAUSS(d3ddev, getDOFResolution()*16/9, getDOFResolution());
 	SDLOG(0, "Reloaded GAUSS\n");
 }
 
@@ -754,7 +912,7 @@ bool RSManager::isTextureText(IDirect3DBaseTexture9* t) {
 }
 
 unsigned RSManager::isDof(unsigned width, unsigned height) {
-	unsigned topWidth = Settings::get().getDOFOverrideResolution()*16/9, topHeight = Settings::get().getDOFOverrideResolution();
+	unsigned topWidth = getDOFResolution()*16/9, topHeight = getDOFResolution();
 	if(width == topWidth && height == topHeight) return 1;
 	if(width == topWidth/2 && height == topHeight/2) return 2;
 	return 0;
diff --git a/RenderstateManager.h b/RenderstateManager.h
index 63c950c..64957f6 100644
--- a/RenderstateManager.h
+++ b/RenderstateManager.h
@@ -117,6 +117,11 @@ class RSManager {
 	void dumpShader(UINT32 hash, const char *directory, LPD3DXBUFFER pBuffer);
 	bool getOverrideShader(UINT32 hash, const char *directory, LPD3DXBUFFER *ppBuffer);
 
+	bool haveOcclusionScale;
+	float occlusionScale;
+
+	void measureOcclusionScale();
+
 private:
     ~RSManager();
 
@@ -127,7 +132,7 @@ class RSManager {
 
 	RSManager() : smaa(NULL), fxaa(NULL), ssao(NULL), gauss(NULL), rgbaBuffer1Surf(NULL), rgbaBuffer1Tex(NULL),
 			inited(false), doAA(true), doSsao(true), doDofGauss(true), doHud(true), captureNextFrame(false), capturing(false), hudStarted(false), takeScreenshot(false), hideHud(false),
-			mainRenderTexIndex(0), mainRenderSurfIndex(0), dumpCaptureIndex(0), numKnownTextures(0), foundKnownTextures(0), skippedPresents(0) {
+			mainRenderTexIndex(0), mainRenderSurfIndex(0), dumpCaptureIndex(0), numKnownTextures(0), foundKnownTextures(0), skippedPresents(0), haveOcclusionScale(false), occlusionScale(1) {
 		#define TEXTURE(_name, _hash) ++numKnownTextures;
 		#include "Textures.def"
 		#undef TEXTURE
@@ -195,4 +200,6 @@ class RSManager {
 	HRESULT redirectSetRenderState(D3DRENDERSTATETYPE State, DWORD Value);
 	HRESULT redirectCreatePixelShader(CONST DWORD *pfunction, IDirect3DPixelShader9 **ppShader);
 	HRESULT redirectCreateVertexShader(CONST DWORD *pfunction, IDirect3DVertexShader9 **ppShader);
+
+	float getOcclusionScale() const { return occlusionScale; }
 };
diff --git a/d3d9.h b/d3d9.h
index d512f4b..2d142e9 100644
--- a/d3d9.h
+++ b/d3d9.h
@@ -9,5 +9,6 @@
 #include <d3dx9.h>
 #include "d3d9int.h"
 #include "d3d9dev.h"
+#include "d3d9query.h"
 
 IDirect3D9 *APIENTRY hkDirect3DCreate9(UINT SDKVersion);
diff --git a/d3d9dev.cpp b/d3d9dev.cpp
index 4d1f86a..291258d 100644
--- a/d3d9dev.cpp
+++ b/d3d9dev.cpp
@@ -186,7 +186,12 @@ HRESULT APIENTRY hkIDirect3DDevice9::CreatePixelShader(CONST DWORD* pFunction,ID
 }
 
 HRESULT APIENTRY hkIDirect3DDevice9::CreateQuery(D3DQUERYTYPE Type,IDirect3DQuery9** ppQuery) {
-	return m_pD3Ddev->CreateQuery(Type, ppQuery);
+	auto result = m_pD3Ddev->CreateQuery(Type, ppQuery);
+	if (Type == D3DQUERYTYPE_OCCLUSION && result == D3D_OK) {
+		new hkIDirect3DQuery9(ppQuery);
+		// These instances will leak, but there are only a set number of them created
+	}
+	return result;
 }
 
 HRESULT APIENTRY hkIDirect3DDevice9::CreateRenderTarget(UINT Width, UINT Height, D3DFORMAT Format, D3DMULTISAMPLE_TYPE MultiSample, DWORD MultisampleQuality, BOOL Lockable, IDirect3DSurface9** ppSurface, HANDLE* pSharedHandle) {
diff --git a/d3d9query.cpp b/d3d9query.cpp
new file mode 100644
index 0000000..83b53c4
--- /dev/null
+++ b/d3d9query.cpp
@@ -0,0 +1,46 @@
+#include "d3d9.h"
+#include "main.h"
+#include "RenderstateManager.h"
+#include "Settings.h"
+
+hkIDirect3DQuery9::hkIDirect3DQuery9(IDirect3DQuery9 **ppReturnedQueryInterface) {
+	m_pD3Dquery = *ppReturnedQueryInterface;
+	*ppReturnedQueryInterface = this;
+}
+
+HRESULT APIENTRY hkIDirect3DQuery9::QueryInterface(REFIID riid, void** ppvObj) {
+	return m_pD3Dquery->QueryInterface(riid, ppvObj);
+}
+
+ULONG APIENTRY hkIDirect3DQuery9::AddRef() {
+	return m_pD3Dquery->AddRef();
+}
+
+ULONG APIENTRY hkIDirect3DQuery9::Release() {
+	return m_pD3Dquery->Release();
+}
+
+HRESULT APIENTRY hkIDirect3DQuery9::GetDevice(IDirect3DDevice9** ppDevice) {
+	return m_pD3Dquery->GetDevice(ppDevice);
+}
+
+D3DQUERYTYPE APIENTRY hkIDirect3DQuery9::GetType() {
+	return m_pD3Dquery->GetType();
+}
+
+DWORD APIENTRY hkIDirect3DQuery9::GetDataSize() {
+	return m_pD3Dquery->GetDataSize();
+}
+
+HRESULT APIENTRY hkIDirect3DQuery9::Issue(DWORD dwIssueFlags) {
+	return m_pD3Dquery->Issue(dwIssueFlags);
+}
+
+HRESULT APIENTRY hkIDirect3DQuery9::GetData(void* pData, DWORD dwSize, DWORD dwGetDataFlags) {
+	auto result = m_pD3Dquery->GetData(pData, dwSize, dwGetDataFlags);
+	if (SUCCEEDED(result)) {
+		auto pixelsDrawn = reinterpret_cast<DWORD*>(pData);
+		pixelsDrawn[0] = static_cast<DWORD>(pixelsDrawn[0] / RSManager::get().getOcclusionScale());
+	}
+	return result;
+}
\ No newline at end of file
diff --git a/d3d9query.h b/d3d9query.h
new file mode 100644
index 0000000..41c6224
--- /dev/null
+++ b/d3d9query.h
@@ -0,0 +1,19 @@
+#pragma once
+
+#include "d3d9.h"
+
+interface hkIDirect3DQuery9 : public IDirect3DQuery9
+{
+	hkIDirect3DQuery9(IDirect3DQuery9 **ppReturnedQueryInterface);
+
+	IDirect3DQuery9* m_pD3Dquery;
+
+	STDMETHOD(QueryInterface)(THIS_ REFIID riid, void** ppvObj);
+	STDMETHOD_(ULONG, AddRef)(THIS);
+	STDMETHOD_(ULONG, Release)(THIS);
+	STDMETHOD(GetDevice)(THIS_ IDirect3DDevice9** ppDevice);
+	STDMETHOD_(D3DQUERYTYPE, GetType)(THIS);
+	STDMETHOD_(DWORD, GetDataSize)(THIS);
+	STDMETHOD(Issue)(THIS_ DWORD dwIssueFlags);
+	STDMETHOD(GetData)(THIS_ void* pData, DWORD dwSize, DWORD dwGetDataFlags);
+};
\ No newline at end of file