diff --git a/package/Shaders/Common/SharedData.hlsli b/package/Shaders/Common/SharedData.hlsli
index c9458e8cb7..2df2504f1e 100644
--- a/package/Shaders/Common/SharedData.hlsli
+++ b/package/Shaders/Common/SharedData.hlsli
@@ -23,6 +23,7 @@ namespace SharedData
 		bool InMapMenu;   // If the world/local map is open (note that the renderer is still deferred here)
 		bool HideSky;     // HideSky flag in WorldSpace, e.g. Blackreach
 		float MipBias;    // Offset to mip level for TAA sharpness#
+		uint IsNotNativeD3D11;  // Linux/Proton/DXVK detected - use spatial shadow denoising
 	};
 
 	struct GrassLightingSettings
diff --git a/package/Shaders/Utility.hlsl b/package/Shaders/Utility.hlsl
index 075dce0f38..a71eeec3df 100644
--- a/package/Shaders/Utility.hlsl
+++ b/package/Shaders/Utility.hlsl
@@ -375,7 +375,15 @@ float GetPoissonDiskFilteredShadowVisibility(uint3 seed, Texture2DArray<float4>
 	float alphaTestOffset = -AlphaTestRef.y;
 	float sampleRadius = ShadowSampleParam.z * 2048.0;
 	float seedNormalized = seed.x * (1.0 / 4294967295.0); // Use only x component for efficiency
-	uint frameOffset = SharedData::FrameCount * sampleCount;
+
+	// On Linux/Proton/DXVK, use position-based offset instead of frame-based to avoid temporal jitter
+	uint frameOffset;
+	if (SharedData::IsNotNativeD3D11) {
+		int3 quantizedPos = int3(floor(positionMS.xyz * 8.0));
+		frameOffset = Random::murmur3(uint3(quantizedPos));
+	} else {
+		frameOffset = SharedData::FrameCount * sampleCount;
+	}
 
 	// Pre-compute constants
 	const float3 positionOffsetUp = float3(0, 0, 1);
@@ -616,7 +624,15 @@ PS_OUTPUT main(PS_INPUT input)
 	float fadeFactor = input.Alpha.x;
 #		endif
 
-	float noise = Random::InterleavedGradientNoise(input.PositionCS.xy, SharedData::FrameCount);
+	// On Linux/Proton/DXVK, use spatial noise based on world position instead of frame-based temporal noise to stop shimmering
+	float noise;
+	if (SharedData::IsNotNativeD3D11) {
+		int3 quantizedPos = int3(floor(positionMS.xyz * 8.0));
+		uint posHash = Random::murmur3(uint3(quantizedPos));
+		noise = float(posHash) / 4294967295.0;
+	} else {
+		noise = Random::InterleavedGradientNoise(input.PositionCS.xy, SharedData::FrameCount);
+	}
 
 	float2 rotation;
 	sincos(Math::TAU * noise, rotation.y, rotation.x);
diff --git a/src/State.cpp b/src/State.cpp
index 3846ab0046..34fdeb0611 100644
--- a/src/State.cpp
+++ b/src/State.cpp
@@ -707,6 +707,16 @@ void State::SetAdapterDescription(const std::wstring& description)
 {
 	std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
 	adapterDescription = converter.to_bytes(description);
+
+	// Detect Linux/Proton/DXVK by checking adapter description
+	std::string lowerDesc = adapterDescription;
+	std::transform(lowerDesc.begin(), lowerDesc.end(), lowerDesc.begin(), ::tolower);
+	isRunningOnDXVK = (lowerDesc.find("dxvk") != std::string::npos) ||
+	                  (lowerDesc.find("wine") != std::string::npos) ||
+	                  (lowerDesc.find("llvmpipe") != std::string::npos);
+	if (isRunningOnDXVK) {
+		logger::info("Detected Linux/Proton/DXVK environment - using spatial shadow denoising");
+	}
 }
 
 void State::UpdateSharedData([[maybe_unused]] bool a_inWorld, [[maybe_unused]] bool a_prepass)
@@ -778,6 +788,8 @@ void State::UpdateSharedData([[maybe_unused]] bool a_inWorld, [[maybe_unused]] b
 			data.MipBias = 0;
 		}
 
+		data.IsNotNativeD3D11 = isRunningOnDXVK ? 1 : 0;
+
 		sharedDataCB->Update(data);
 	}
 
diff --git a/src/State.h b/src/State.h
index d529e904ff..838ee78343 100644
--- a/src/State.h
+++ b/src/State.h
@@ -45,6 +45,7 @@ class State
 	bool settingCustomShader = false;
 	RE::BSShader* currentShader = nullptr;
 	std::string adapterDescription = "";
+	bool isRunningOnDXVK = false;  // Detected via adapter description
 
 	uint32_t currentVertexDescriptor = 0;
 	uint32_t currentPixelDescriptor = 0;
@@ -203,7 +204,7 @@ class State
 		uint InMapMenu;
 		uint HideSky;
 		float MipBias;
-		float pad0;
+		uint IsNotNativeD3D11;  // True on DXVK/Wine - use spatial denoising instead of temporal
 	};
 	STATIC_ASSERT_ALIGNAS_16(SharedDataCB);