diff --git a/core/libs/prx/libSceAgcDriver/Graphics/src/DepthSurface.cpp b/core/libs/prx/libSceAgcDriver/Graphics/src/DepthSurface.cpp
index d24cec76ac4..3517e33f2c7 100644
--- a/core/libs/prx/libSceAgcDriver/Graphics/src/DepthSurface.cpp
+++ b/core/libs/prx/libSceAgcDriver/Graphics/src/DepthSurface.cpp
@@ -170,7 +170,7 @@ class DepthSurface {
 
 class DepthPlaneCopy {
 public:
-    DepthPlaneCopy(const Context& context, VkExtent2D extent, VkFormat format, std::uint32_t layers) : context(context), extent(extent), format(format), layers(layers) {
+    DepthPlaneCopy(const Context& context, VkExtent2D extent, VkFormat format, std::uint32_t layers) : context(context), extent(extent), format(format), layers(layers), guestLayers(layers) {
         this->context.bufferPool.reset();
         VkImageCreateInfo info{VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO};
         info.flags = layers % 6u == 0 && extent.width == extent.height ? VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT : 0u;
@@ -208,11 +208,23 @@ class DepthPlaneCopy {
         const auto geometry = DescribeSurface(resource);
         Require(geometry.layers == layers && geometry.sliceLinearBytes == sliceBytes() && !geometry.mips.empty(), "depth plane copy geometry does not match its layers");
         std::vector<std::shared_ptr<Buffer>> uploads;
+        std::vector<std::uint32_t> uploadLayers;
         for (std::uint32_t layer = 0; layer < layers; ++layer) {
-            if (slices[layer] != VK_NULL_HANDLE) continue;
+            auto& held = guestLayers[layer];
+            if (slices[layer] != VK_NULL_HANDLE) {
+                held = {};
+                continue;
+            }
+            const GuestLayer current{resource.baseAddress + geometry.GuestLayerOffset(layer), geometry.layerBytes, resource.tileMode, geometry.thick, GuestMemory::CollectWrites(resource.baseAddress + geometry.GuestLayerOffset(layer), static_cast<std::size_t>(geometry.layerBytes))};
+            if (held.generation != 0 && held.address == current.address && held.bytes == current.bytes && held.tileMode == current.tileMode && held.thick == current.thick && !Recorder::SnapshotWriteOverlaps(current.address, static_cast<std::size_t>(current.bytes)) && GuestMemory::UnchangedSince(current.address, static_cast<std::size_t>(current.bytes), held.generation)) {
+                held.generation = current.generation;
+                continue;
+            }
             auto upload = std::make_shared<Buffer>(context, static_cast<std::size_t>(geometry.layerBytes), VK_BUFFER_USAGE_STORAGE_BUFFER_BIT);
-            GuestMemory::ReadCommitted(resource.baseAddress + geometry.GuestLayerOffset(layer), upload->Bytes().first(static_cast<std::size_t>(geometry.layerBytes)));
+            GuestMemory::ReadCommitted(current.address, upload->Bytes().first(static_cast<std::size_t>(geometry.layerBytes)));
             uploads.push_back(std::move(upload));
+            uploadLayers.push_back(layer);
+            held = current;
         }
         if (!uploads.empty()) {
             Require(context.detiler != nullptr, "depth plane copy requires a texture detiler");
@@ -235,10 +247,9 @@ class DepthPlaneCopy {
         }
         if (!uploads.empty()) {
             RecordMemoryBarrier(context, commands, VK_PIPELINE_STAGE_HOST_BIT | VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT, VK_ACCESS_HOST_WRITE_BIT | VK_ACCESS_TRANSFER_WRITE_BIT, VK_ACCESS_SHADER_READ_BIT | VK_ACCESS_SHADER_WRITE_BIT);
-            std::size_t next = 0;
-            for (std::uint32_t layer = 0; layer < layers; ++layer) {
-                if (slices[layer] != VK_NULL_HANDLE) continue;
-                context.detiler->Dispatch(commands, resource.tileMode, format == VK_FORMAT_D32_SFLOAT ? 4u : 2u, uploads[next++]->Handle(), 0, staging->Handle(), geometry.LinearLayerOffset(layer), geometry.mips.front(), false, layer, geometry.thick);
+            for (std::size_t upload = 0; upload < uploads.size(); ++upload) {
+                const auto layer = uploadLayers[upload];
+                context.detiler->Dispatch(commands, resource.tileMode, format == VK_FORMAT_D32_SFLOAT ? 4u : 2u, uploads[upload]->Handle(), 0, staging->Handle(), geometry.LinearLayerOffset(layer), geometry.mips.front(), false, layer, geometry.thick);
             }
             if (recorder != nullptr) {
                 for (auto& upload : uploads) recorder->Keep(upload);
@@ -280,10 +291,19 @@ class DepthPlaneCopy {
     const std::uint32_t layers;
 
 private:
+    struct GuestLayer {
+        std::uint64_t address = 0;
+        std::uint64_t bytes = 0;
+        TextureTileMode tileMode = TextureTileMode::kLinear;
+        bool thick = false;
+        std::uint64_t generation = 0;
+    };
+
     VkImage image = VK_NULL_HANDLE;
     VkDeviceMemory memory = VK_NULL_HANDLE;
     std::unique_ptr<DeviceBuffer> staging;
     std::map<std::array<std::uint32_t, 5>, std::shared_ptr<Texture>> textures;
+    std::vector<GuestLayer> guestLayers;
 
     VkDeviceSize sliceBytes() const {
         return static_cast<VkDeviceSize>(extent.width) * extent.height * (format == VK_FORMAT_D32_SFLOAT ? 4u : 2u);
diff --git a/core/libs/prx/libSceAgcDriver/tests/execution/DepthPlaneGuestLayers.cpp b/core/libs/prx/libSceAgcDriver/tests/execution/DepthPlaneGuestLayers.cpp
new file mode 100644
index 00000000000..a03da4ce0d9
--- /dev/null
+++ b/core/libs/prx/libSceAgcDriver/tests/execution/DepthPlaneGuestLayers.cpp
@@ -0,0 +1,273 @@
+#include "prx/libSceAgcDriver/Execution/include/BdaFeatures.hpp"
+#include "prx/libSceAgcDriver/Execution/include/GuestMemory.hpp"
+#include "prx/libSceAgcDriver/Graphics/include/DepthSurface.hpp"
+#include "prx/libSceAgcDriver/Graphics/include/Texture.hpp"
+#include "prx/libSceAgcDriver/Graphics/include/TextureDetiler.hpp"
+#include "prx/libc/include/GuestAllocations.hpp"
+#include "prx/libc/include/GuestArena.hpp"
+#include "prx/libc/include/GuestWriteWatch.hpp"
+#include <SDL_loadso.h>
+#ifdef _WIN32
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+#include <windows.h>
+#else
+#include <sys/mman.h>
+#endif
+#include <algorithm>
+#include <array>
+#include <atomic>
+#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <iostream>
+#include <memory>
+#include <optional>
+#include <stdexcept>
+#include <string>
+#include <vector>
+
+namespace {
+
+using namespace AgcDriver::Graphics;
+
+constexpr std::uint32_t Side = 256;
+constexpr std::uint32_t Format32Float = 22;
+constexpr std::size_t LayerBytes = std::size_t{Side} * Side * 4u;
+constexpr std::size_t BlockBytes = 2u * LayerBytes;
+constexpr int Skipped = 77;
+
+class Device {
+public:
+    Device() {
+#ifdef _WIN32
+        library = SDL_LoadObject("vulkan-1.dll");
+#else
+        library = SDL_LoadObject("libvulkan.so.1");
+#endif
+        Require(library != nullptr, "cannot load Vulkan");
+        try {
+            instanceProc = reinterpret_cast<PFN_vkGetInstanceProcAddr>(SDL_LoadFunction(library, "vkGetInstanceProcAddr"));
+            Require(instanceProc != nullptr, "missing Vulkan instance resolver");
+            VkApplicationInfo application{VK_STRUCTURE_TYPE_APPLICATION_INFO};
+            application.apiVersion = VK_API_VERSION_1_1;
+            VkInstanceCreateInfo info{VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO};
+            info.pApplicationInfo = &application;
+            Check(function<PFN_vkCreateInstance>("vkCreateInstance")(&info, nullptr, &instance), "vkCreateInstance");
+            std::uint32_t count = 0;
+            const auto enumerate = function<PFN_vkEnumeratePhysicalDevices>("vkEnumeratePhysicalDevices");
+            Check(enumerate(instance, &count, nullptr), "vkEnumeratePhysicalDevices");
+            Require(count != 0, "no Vulkan device");
+            std::vector<VkPhysicalDevice> devices(count);
+            Check(enumerate(instance, &count, devices.data()), "vkEnumeratePhysicalDevices");
+            context.physical = devices.front();
+            const auto extensions = function<PFN_vkEnumerateDeviceExtensionProperties>("vkEnumerateDeviceExtensionProperties");
+            Check(extensions(context.physical, nullptr, &count, nullptr), "vkEnumerateDeviceExtensionProperties");
+            std::vector<VkExtensionProperties> available(count);
+            Check(extensions(context.physical, nullptr, &count, available.data()), "vkEnumerateDeviceExtensionProperties");
+            auto bytes = AgcDriver::QueryBdaByteFeatures(context.physical, function<PFN_vkGetPhysicalDeviceFeatures2>("vkGetPhysicalDeviceFeatures2"), available);
+            auto address = AgcDriver::QueryBdaFeatures(context.physical, function<PFN_vkGetPhysicalDeviceFeatures2>("vkGetPhysicalDeviceFeatures2"), available);
+            const auto queues = function<PFN_vkGetPhysicalDeviceQueueFamilyProperties>("vkGetPhysicalDeviceQueueFamilyProperties");
+            queues(context.physical, &count, nullptr);
+            std::vector<VkQueueFamilyProperties> families(count);
+            queues(context.physical, &count, families.data());
+            constexpr VkQueueFlags needed = VK_QUEUE_GRAPHICS_BIT | VK_QUEUE_COMPUTE_BIT;
+            std::uint32_t family = 0;
+            while (family < count && (families[family].queueFlags & needed) != needed) ++family;
+            Require(family < count, "no Vulkan graphics and compute queue");
+            const float priority = 1;
+            VkDeviceQueueCreateInfo queue{VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO};
+            queue.queueFamilyIndex = family;
+            queue.queueCount = 1;
+            queue.pQueuePriorities = &priority;
+            VkPhysicalDeviceFeatures enabled{};
+            enabled.shaderInt64 = VK_TRUE;
+            address.pNext = &bytes;
+            const std::array<const char*, 2> extensionsEnabled{VK_KHR_BUFFER_DEVICE_ADDRESS_EXTENSION_NAME, VK_KHR_8BIT_STORAGE_EXTENSION_NAME};
+            VkDeviceCreateInfo device{VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO, &address};
+            device.queueCreateInfoCount = 1;
+            device.pQueueCreateInfos = &queue;
+            device.enabledExtensionCount = static_cast<std::uint32_t>(extensionsEnabled.size());
+            device.ppEnabledExtensionNames = extensionsEnabled.data();
+            device.pEnabledFeatures = &enabled;
+            Check(function<PFN_vkCreateDevice>("vkCreateDevice")(context.physical, &device, nullptr, &context.device), "vkCreateDevice");
+            context.deviceProc = function<PFN_vkGetDeviceProcAddr>("vkGetDeviceProcAddr");
+            function<PFN_vkGetPhysicalDeviceMemoryProperties>("vkGetPhysicalDeviceMemoryProperties")(context.physical, &context.memory);
+            VkPhysicalDeviceProperties properties{};
+            function<PFN_vkGetPhysicalDeviceProperties>("vkGetPhysicalDeviceProperties")(context.physical, &properties);
+            context.limits = properties.limits;
+            context.bufferDeviceAddress = true;
+            context.formatProperties = function<PFN_vkGetPhysicalDeviceFormatProperties>("vkGetPhysicalDeviceFormatProperties");
+            context.Function<PFN_vkGetDeviceQueue>("vkGetDeviceQueue")(context.device, family, 0, &context.queue);
+            VkCommandPoolCreateInfo pool{VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO};
+            pool.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
+            pool.queueFamilyIndex = family;
+            Check(context.Function<PFN_vkCreateCommandPool>("vkCreateCommandPool")(context.device, &pool, nullptr, &context.pool), "vkCreateCommandPool");
+        } catch (...) {
+            release();
+            throw;
+        }
+    }
+
+    ~Device() { release(); }
+    Device(const Device&) = delete;
+    Device& operator=(const Device&) = delete;
+    const Context& GetContext() const { return context; }
+
+private:
+    template<typename TFunction>
+    TFunction function(const char* name) const {
+        const auto result = reinterpret_cast<TFunction>(instanceProc(instance, name));
+        Require(result != nullptr, name);
+        return result;
+    }
+
+    void release() noexcept {
+        if (context.device != VK_NULL_HANDLE) ClearDepthSurfaces(context.device);
+        if (context.pool != VK_NULL_HANDLE) context.Function<PFN_vkDestroyCommandPool>("vkDestroyCommandPool")(context.device, context.pool, nullptr);
+        context.bufferPool.reset();
+        if (context.device != VK_NULL_HANDLE) function<PFN_vkDestroyDevice>("vkDestroyDevice")(context.device, nullptr);
+        if (instance != VK_NULL_HANDLE) function<PFN_vkDestroyInstance>("vkDestroyInstance")(instance, nullptr);
+        if (library != nullptr) SDL_UnloadObject(library);
+    }
+
+    void* library = nullptr;
+    PFN_vkGetInstanceProcAddr instanceProc = nullptr;
+    VkInstance instance = VK_NULL_HANDLE;
+    Context context{};
+};
+
+class WatchedBlock {
+public:
+    WatchedBlock() {
+#ifdef _WIN32
+        block = static_cast<std::uint8_t*>(GuestArena::GuestArenaAllocate_nid_postfix(BlockBytes, 65536));
+        if (block != nullptr) GuestArena::GuestArenaCommit_nid_postfix(block, BlockBytes, PAGE_READWRITE, BlockBytes);
+#else
+        constexpr std::uintptr_t alignment = 65536;
+        void* mapped = mmap(nullptr, BlockBytes + alignment, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+        if (mapped != MAP_FAILED) {
+            const auto begin = reinterpret_cast<std::uintptr_t>(mapped);
+            const auto aligned = (begin + alignment - 1) & ~(alignment - 1);
+            if (aligned != begin) munmap(mapped, aligned - begin);
+            if (aligned + BlockBytes != begin + BlockBytes + alignment) munmap(reinterpret_cast<void*>(aligned + BlockBytes), begin + alignment - aligned);
+            block = reinterpret_cast<std::uint8_t*>(aligned);
+            GuestWriteWatch::GuestWriteWatchRegister_nid_postfix(block, BlockBytes);
+        }
+#endif
+        Require(block != nullptr, "depth plane guest layers: cannot allocate the guest block");
+        GuestAllocations::Mutation().Add(block, BlockBytes, true, true, true);
+    }
+
+    ~WatchedBlock() {
+        GuestAllocations::Mutation().Remove(block);
+#ifdef _WIN32
+        GuestArena::GuestArenaReset_nid_postfix(block, BlockBytes);
+        GuestArena::GuestArenaRelease_nid_postfix(block, BlockBytes);
+#else
+        munmap(block, BlockBytes);
+        GuestWriteWatch::GuestWriteWatchUnregister_nid_postfix(block, BlockBytes);
+#endif
+    }
+
+    WatchedBlock(const WatchedBlock&) = delete;
+    WatchedBlock& operator=(const WatchedBlock&) = delete;
+
+    std::uint8_t* Data() const { return block; }
+    std::uint64_t Address() const { return static_cast<std::uint64_t>(reinterpret_cast<std::uintptr_t>(block)); }
+
+private:
+    std::uint8_t* block = nullptr;
+};
+
+std::atomic<std::uint64_t> watchedBegin{0};
+std::atomic<std::uint64_t> watchedEnd{0};
+std::atomic<std::uint32_t> watchedReads{0};
+
+void CountReads(std::uint64_t address, std::size_t bytes) {
+    if (address < watchedEnd.load() && address + bytes > watchedBegin.load()) watchedReads.fetch_add(1);
+}
+
+void FillLayer(std::uint8_t* layer, float depth) {
+    for (std::size_t offset = 0; offset < LayerBytes; offset += sizeof(depth)) std::memcpy(layer + offset, &depth, sizeof(depth));
+}
+
+void Run(const Context& base, const WatchedBlock& block) {
+    TextureDetiler detiler(base);
+    auto context = base;
+    context.detiler = &detiler;
+    const auto address = block.Address();
+    FillLayer(block.Data(), 1.0f);
+    FillLayer(block.Data() + LayerBytes, 0.25f);
+    Require(DepthSliceBytes({Side, Side}, 4u) == LayerBytes, "the depth slice of the test surface is not one layer of the guest block");
+    DepthSurfaceView(context, DepthTarget{address, 0, {Side, Side}, VK_FORMAT_D32_SFLOAT, 1.0f, 0, 0});
+    GuestTextureResource resource{};
+    resource.baseAddress = address;
+    resource.width = Side;
+    resource.height = Side;
+    resource.depthOrLastArray = 1;
+    resource.mipCount = 1;
+    resource.tileMode = TextureTileMode::kZ64KBX;
+    resource.dimension = TextureDimension::k2DArray;
+    resource.format = Format32Float;
+    resource.dstSelX = 4;
+    resource.dstSelY = 5;
+    resource.dstSelZ = 6;
+    resource.dstSelW = 7;
+    const std::array<std::uint32_t, 8> words{};
+    const VkComponentMapping components{VK_COMPONENT_SWIZZLE_IDENTITY, VK_COMPONENT_SWIZZLE_IDENTITY, VK_COMPONENT_SWIZZLE_IDENTITY, VK_COMPONENT_SWIZZLE_IDENTITY};
+    watchedBegin = address + LayerBytes;
+    watchedEnd = address + BlockBytes;
+    AgcDriver::GuestMemory::SetFlushHook(&CountReads);
+    const auto sample = [&](const char* when) {
+        watchedReads = 0;
+        const auto texture = DepthSurfaceTexture(context, words, resource, components);
+        Require(texture != nullptr, std::string("the 2D array over the depth surface was not sampled through its depth planes ") + when);
+        return watchedReads.load();
+    };
+    try {
+        Require(sample("at its first use") != 0, "the first sampling of the depth planes did not read the layer no depth surface holds");
+        Require(sample("again") == 0, "sampling the depth planes again read the guest layer no depth surface holds although nothing wrote it");
+        FillLayer(block.Data() + LayerBytes, 0.75f);
+        Require(sample("after a CPU write") != 0, "sampling the depth planes after a CPU write to the guest layer did not read it again");
+        Require(sample("after the re-read") == 0, "sampling the depth planes after the re-read of the written layer read it once more");
+        AgcDriver::GuestMemory::MarkWritten(address + LayerBytes, 4096);
+        Require(sample("after a driver store") != 0, "sampling the depth planes after a driver store over the guest layer did not read it again");
+    } catch (...) {
+        AgcDriver::GuestMemory::SetFlushHook(nullptr);
+        throw;
+    }
+    AgcDriver::GuestMemory::SetFlushHook(nullptr);
+}
+
+}
+
+int main() {
+    try {
+        if (!AgcDriver::GuestMemory::WriteWatched()) {
+            std::puts("skipped, guest memory has no write watch");
+            return Skipped;
+        }
+        std::optional<Device> device;
+        try {
+            device.emplace();
+        } catch (const std::exception& error) {
+            if (std::getenv("ANYPS5_REQUIRE_VULKAN") != nullptr) throw;
+            std::printf("skipped, no usable Vulkan device: %s\n", error.what());
+            return Skipped;
+        }
+        {
+            WatchedBlock block;
+            Require(AgcDriver::GuestMemory::Watched(block.Address(), BlockBytes), "depth plane guest layers: the guest block is not write-watched");
+            Run(device->GetContext(), block);
+        }
+        device.reset();
+        std::puts("depth plane guest layer tests passed");
+        return 0;
+    } catch (const std::exception& error) {
+        std::cerr << error.what() << '\n';
+        return 1;
+    }
+}