diff --git a/src/Pipeline/SpirvShaderImage.cpp b/src/Pipeline/SpirvShaderImage.cpp
index 5f90061203..45e6881d31 100644
--- a/src/Pipeline/SpirvShaderImage.cpp
+++ b/src/Pipeline/SpirvShaderImage.cpp
@@ -1482,7 +1482,11 @@ void SpirvEmitter::WriteImage(ImageInstructionSignature instruction, Pointer<Byt
 	// "The integer texel coordinates are validated according to the same rules as for texel input coordinate
 	//  validation. If the texel fails integer texel coordinate validation, then the write has no effect."
 	// - https://www.khronos.org/registry/vulkan/specs/1.2/html/chap16.html#textures-output-coordinate-validation
-	auto robustness = OutOfBoundsBehavior::Nullify;
+	// POC NOTE: SwiftShader unconditionally provides robustImageAccess (see VkPhysicalDevice.cpp
+	// defaultRobustnessImages = VK_PIPELINE_ROBUSTNESS_IMAGE_BEHAVIOR_ROBUST_IMAGE_ACCESS_EXT). On real GPU
+	// hardware ANGLE never enables robustImageAccess, so OOB imageStore is undefined. We disable the
+	// SwiftShader-only safety net here to emulate real-GPU behavior (this does NOT modify ANGLE/Chrome).
+	auto robustness = OutOfBoundsBehavior::UndefinedBehavior;
 	// GetTexelAddress() only needs the SpirvRoutine* for SubpassData accesses (i.e. input attachments).
 	const SpirvRoutine *routine = nullptr;