diff --git a/src/graphics/host_gpu/renderer/cache/textureCache.cpp b/src/graphics/host_gpu/renderer/cache/textureCache.cpp
index b16d257d9..e2a779d79 100644
--- a/src/graphics/host_gpu/renderer/cache/textureCache.cpp
+++ b/src/graphics/host_gpu/renderer/cache/textureCache.cpp
@@ -804,8 +804,14 @@ TextureCache::OverlapResult TextureCache::ResolveOverlap(const ImageInfo& reques
 		if (requested.IsBlock() && !cached.info.IsBlock()) {
 			return {ExpandImage(requested, cached_id)};
 		}
-		if (requested.data.size == cached.info.data.size &&
-		    (requested.IsVolume() || cached.info.IsVolume())) {
+		// Volume depth is not an array-layer count. A larger depth can retain the
+		// same block-slice layout while requiring a larger native image.
+		if ((requested.IsVolume() || cached.info.IsVolume()) &&
+		    (requested.data.size == cached.info.data.size ||
+		     (requested.type == cached.info.type && requested.resources == cached.info.resources &&
+		      requested.extent.width == cached.info.extent.width &&
+		      requested.extent.height == cached.info.extent.height &&
+		      requested.extent.depth > cached.info.extent.depth))) {
 			return {ExpandImage(requested, cached_id)};
 		}
 		// PPSA08394
diff --git a/src/graphics/host_gpu/renderer/image/image.cpp b/src/graphics/host_gpu/renderer/image/image.cpp
index 77ecdb835..7f35de2e6 100644
--- a/src/graphics/host_gpu/renderer/image/image.cpp
+++ b/src/graphics/host_gpu/renderer/image/image.cpp
@@ -340,7 +340,9 @@ void Image::CopyImage(Image& source) {
 	EXIT_IF(source.backing.samples != backing.samples);
 	m_scheduler.EndRendering();
 	const uint32_t levels     = std::min(source.backing.mip_levels, backing.mip_levels);
-	const uint32_t base_depth = backing.image_type == vk::ImageType::e3D
+	const uint32_t base_depth = source.backing.image_type == backing.image_type
+	                                ? std::min(source.backing.extent.depth, backing.extent.depth)
+	                            : backing.image_type == vk::ImageType::e3D
 	                                ? backing.extent.depth
 	                                : source.backing.extent.depth;
 	const auto     source_aspect =
diff --git a/tests/ShaderRecompilerComputeTests.cpp b/tests/ShaderRecompilerComputeTests.cpp
index 2b4ffa7a2..86e1ad205 100644
--- a/tests/ShaderRecompilerComputeTests.cpp
+++ b/tests/ShaderRecompilerComputeTests.cpp
@@ -9111,9 +9111,10 @@ public:
   void CheckRenderExecutorColorVolumeDiscovery() {
     constexpr const char *name = "RenderExecutorColorVolumeDiscovery";
     constexpr uintptr_t base = 0x0000000203e00000ull;
+    constexpr uint64_t slice_size = 0x10000;
     constexpr uint64_t color_size = 0x200000;
     constexpr uint64_t metadata_size = 0x20000;
-    constexpr uint64_t allocation_size = color_size + metadata_size;
+    constexpr uint64_t allocation_size = 56 * slice_size;
     constexpr uint64_t allocation_alignment = 0x10000;
     EnsureRuntimeContext();
 
@@ -9131,7 +9132,6 @@ public:
                 mapped == reinterpret_cast<void *>(base),
             "color-volume fixed mapping failed");
     std::memset(mapped, 0x5a, allocation_size);
-    constexpr uint64_t slice_size = 0x10000;
 
     {
       RenderContext context(m_runtime_context);
@@ -9358,6 +9358,26 @@ public:
                               [](uint8_t byte) { return byte == 0xff; }),
               "full volume acquisition left an unconsumed native clear slice");
 
+      TextureCacheTestAccess::ClearImage(
+          texture_cache, scheduler.Current(), color.image_id,
+          {vk::ImageAspectFlagBits::eColor, 0, 1, 31, 1}, painted);
+      auto expanded = storage_desc;
+      expanded.info.extent.depth = 56;
+      expanded.info.data.size = allocation_size;
+      const auto expanded_id = texture_cache.FindImage(expanded);
+      Require(name, "3D storage depth expansion",
+              expanded_id != color.image_id &&
+                  !TextureCacheTestAccess::Contains(texture_cache, color.image_id) &&
+                  texture_cache.GetImage(expanded_id).backing.extent.depth == 56 &&
+                  texture_cache.GetImage(expanded_id).IsGpuModified(),
+              "a deeper storage binding reused the smaller native volume");
+      Require(name, "3D expansion preserves native prefix and guest suffix",
+              ReadCachedTexel(name, context, expanded_id, {0, 0, 31}) ==
+                  std::vector<u32>{0x3fffffffu} &&
+                  ReadCachedTexel(name, context, expanded_id, {0, 0, 55}) ==
+                      std::vector<u32>{0x5a5a5a5a},
+              "volume expansion lost GPU writes or copied beyond the old depth");
+
       RenderExecutorTestAccess::ResetBindings(executor);
       resources.UnmapMemory(base, allocation_size);
       scheduler.Finish();