Index: binaries/data/config/default.cfg
===================================================================
--- binaries/data/config/default.cfg
+++ binaries/data/config/default.cfg
@@ -117,6 +117,10 @@
 ; Use anti-aliasing techniques.
 antialiasing = "disabled"
 
+; Use sharpening techniques.
+sharpening = "disabled"
+sharpness = 0.3
+
 ; Quality level of shader effects (set to 10 to display all effects)
 materialmgr.quality = 2.0
 
Index: binaries/data/mods/public/gui/options/options.json
===================================================================
--- binaries/data/mods/public/gui/options/options.json
+++ binaries/data/mods/public/gui/options/options.json
@@ -130,6 +130,28 @@
 				"function": "Renderer_UpdateAntiAliasingTechnique"
 			},
 			{
+				"type": "dropdown",
+				"label": "Sharpening",
+				"tooltip": "Reduce blurry effects.",
+				"dependencies": ["postproc"],
+				"config": "sharpening",
+				"list": [
+					{ "value": "disabled", "label": "Disabled", "tooltip": "Do not use sharpening." },
+					{ "value": "cas", "label": "CAS", "tooltip": "Contrast adaptive sharpening, a fast, contrast based sharpening pass." }
+				],
+				"function": "Renderer_UpdateSharpeningTechnique"
+			},
+			{
+				"type": "slider",
+				"label": "Sharpness factor",
+				"tooltip": "The sharpness of the choosen pass.",
+				"dependencies": ["postproc"],
+				"config": "sharpness",
+				"min": 0,
+				"max": 1,
+				"function": "Renderer_UpdateSharpnessFactor"
+			},
+			{
 				"type": "slider",
 				"label": "Shader effects",
 				"tooltip": "Number of shader effects. REQUIRES GAME RESTART",
Index: binaries/data/mods/public/gui/options/options.xml
===================================================================
--- binaries/data/mods/public/gui/options/options.xml
+++ binaries/data/mods/public/gui/options/options.xml
@@ -9,7 +9,7 @@
 	<object type="image" sprite="ModernFade"/>
 
 	<!-- Settings Window -->
-	<object name="options" type="image" style="ModernDialog" size="50%-350 50%-344 50%+350 50%+344">
+	<object name="options" type="image" style="ModernDialog" size="50%-350 50%-374 50%+350 50%+374">
 
 		<object style="ModernLabelText" type="text" size="50%-128 -16 50%+128 16">
 			<translatableAttribute id="caption">Game Options</translatableAttribute>
Index: source/ps/CStrInternStatic.h
===================================================================
--- source/ps/CStrInternStatic.h
+++ source/ps/CStrInternStatic.h
@@ -135,6 +135,7 @@
 X(shadowScale)
 X(shadowTex)
 X(shadowTransform)
+X(sharpness)
 X(skinBlendMatrices)
 X2(skinBlendMatrices_0, "skinBlendMatrices[0]")
 X(skyBoxRot)
Index: source/renderer/PostprocManager.h
===================================================================
--- source/renderer/PostprocManager.h
+++ source/renderer/PostprocManager.h
@@ -50,6 +50,8 @@
 
 	// Triggers update of shaders and FBO if needed.
 	void UpdateAntiAliasingTechnique();
+	void UpdateSharpeningTechnique();
+	void UpdateSharpnessFactor();
 
 	void SetDepthBufferClipPlanes(float nearPlane, float farPlane);
 
@@ -91,6 +93,10 @@
 	CStrW m_PostProcEffect;
 	CShaderTechniquePtr m_PostProcTech;
 
+	CStr m_SharpName;
+	CShaderTechniquePtr m_SharpTech;
+	float m_Sharpness;
+
 	CStr m_AAName;
 	CShaderTechniquePtr m_AATech;
 
Index: source/renderer/PostprocManager.cpp
===================================================================
--- source/renderer/PostprocManager.cpp
+++ source/renderer/PostprocManager.cpp
@@ -81,6 +81,8 @@
 	m_Height = g_Renderer.GetHeight();
 
 	UpdateAntiAliasingTechnique();
+	UpdateSharpeningTechnique();
+	UpdateSharpnessFactor();
 	RecreateBuffers();
 	m_IsInitialized = true;
 
@@ -428,6 +430,8 @@
 	shader->Uniform(str_zNear, m_NearPlane);
 	shader->Uniform(str_zFar, m_FarPlane);
 
+	shader->Uniform(str_sharpness, m_Sharpness);
+
 	shader->Uniform(str_brightness, g_LightEnv.m_Brightness);
 	shader->Uniform(str_hdr, g_LightEnv.m_Contrast);
 	shader->Uniform(str_saturation, g_LightEnv.m_Saturation);
@@ -504,6 +508,12 @@
 			ApplyEffect(m_AATech, pass);
 	}
 
+	if (m_SharpTech)
+	{
+		for (int pass = 0; pass < m_SharpTech->GetNumPasses(); ++pass)
+			ApplyEffect(m_SharpTech, pass);
+	}
+
 	pglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_PongFbo);
 	pglFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, m_DepthTex, 0);
 
@@ -570,6 +580,29 @@
 	}
 }
 
+void CPostprocManager::UpdateSharpeningTechnique()
+{
+	if (!g_RenderingOptions.GetPreferGLSL())
+		return;
+
+	CStr newSharpName;
+	CFG_GET_VAL("sharpening", newSharpName);
+	if (m_SharpName == newSharpName)
+		return;
+	m_SharpName = newSharpName;
+	m_SharpTech.reset();
+
+	if (m_SharpName == "cas")
+	{
+		m_SharpTech = g_Renderer.GetShaderManager().LoadEffect(CStrIntern(m_SharpName));
+	}
+}
+
+void CPostprocManager::UpdateSharpnessFactor()
+{
+	CFG_GET_VAL("sharpness", m_Sharpness);
+}
+
 void CPostprocManager::SetDepthBufferClipPlanes(float nearPlane, float farPlane)
 {
 	m_NearPlane = nearPlane;
@@ -633,6 +666,14 @@
 {
 }
 
+void CPostprocManager::UpdateSharpeningTechnique()
+{
+}
+
+void CPostprocManager::UpdateSharpnessFactor()
+{
+}
+
 void CPostprocManager::CaptureRenderOutput()
 {
 }
Index: source/renderer/scripting/JSInterface_Renderer.h
===================================================================
--- source/renderer/scripting/JSInterface_Renderer.h
+++ source/renderer/scripting/JSInterface_Renderer.h
@@ -29,6 +29,8 @@
 	std::string GetRenderPath(ScriptInterface::CxPrivate* pCxPrivate);
 	void SetRenderPath(ScriptInterface::CxPrivate* pCxPrivate, const std::string& name);
 	void UpdateAntiAliasingTechnique(ScriptInterface::CxPrivate* pCxPrivate);
+	void UpdateSharpeningTechnique(ScriptInterface::CxPrivate* pCxPrivate);
+	void UpdateSharpnessFactor(ScriptInterface::CxPrivate* pCxPrivate);
 	void RecreateShadowMap(ScriptInterface::CxPrivate* pCxPrivate);
 	bool TextureExists(ScriptInterface::CxPrivate* pCxPrivate, const std::wstring& filename);
 
Index: source/renderer/scripting/JSInterface_Renderer.cpp
===================================================================
--- source/renderer/scripting/JSInterface_Renderer.cpp
+++ source/renderer/scripting/JSInterface_Renderer.cpp
@@ -72,6 +72,16 @@
 	g_Renderer.GetPostprocManager().UpdateAntiAliasingTechnique();
 }
 
+void JSI_Renderer::UpdateSharpeningTechnique(ScriptInterface::CxPrivate* UNUSED(pCxPrivate))
+{
+	g_Renderer.GetPostprocManager().UpdateSharpeningTechnique();
+}
+
+void JSI_Renderer::UpdateSharpnessFactor(ScriptInterface::CxPrivate* UNUSED(pCxPrivate))
+{
+	g_Renderer.GetPostprocManager().UpdateSharpnessFactor();
+}
+
 void JSI_Renderer::RecreateShadowMap(ScriptInterface::CxPrivate* UNUSED(pCxPrivate))
 {
 	g_Renderer.GetShadowMap().RecreateTexture();
@@ -92,6 +102,8 @@
 	scriptInterface.RegisterFunction<void, std::string, &JSI_Renderer::SetRenderPath>("Renderer_SetRenderPath");
 	scriptInterface.RegisterFunction<void, &JSI_Renderer::RecreateShadowMap>("Renderer_RecreateShadowMap");
 	scriptInterface.RegisterFunction<void, &JSI_Renderer::UpdateAntiAliasingTechnique>("Renderer_UpdateAntiAliasingTechnique");
+	scriptInterface.RegisterFunction<void, &JSI_Renderer::UpdateSharpeningTechnique>("Renderer_UpdateSharpeningTechnique");
+	scriptInterface.RegisterFunction<void, &JSI_Renderer::UpdateSharpnessFactor>("Renderer_UpdateSharpnessFactor");
 	scriptInterface.RegisterFunction<bool, std::wstring, &JSI_Renderer::TextureExists>("TextureExists");
 	REGISTER_BOOLEAN_SCRIPT_SETTING(Shadows);
 	REGISTER_BOOLEAN_SCRIPT_SETTING(ShadowPCF);