MCRcortex · PoPoGH · Sep 17, 2026
diff --git a/README.md b/README.md
@@ -1 +1,34 @@
-Voxy is an LoD rendering mod for minecraft
+Voxy is an LoD rendering mod for minecraft
+
+## Minecraft 26.3 port
+
+Requires Java 25, Fabric Loader 0.19.5+, Fabric API 0.160.7+26.3 and
+Sodium mc26.3-0.9.2-fabric. This port uses **OpenGL**. Vulkan LoD rendering
+is not implemented; Voxy disables its renderer when another backend is selected.
+
+Build with a Java 25 JDK selected in `JAVA_HOME`:
+
+```powershell
+.\gradlew.bat build
+```
+
+The mod jar is written to `build/libs`. Optional development dependencies are
+pinned in `gradle.properties`. Vivecraft, Flashback and Nvidium remain compile-only
+integration targets from earlier Minecraft releases; their 26.3 compatibility is
+not claimed. Iris 1.11.6+26.3 can be enabled in the development client with
+`-Pruntime.iris_version=1.11.6+26.3-fabric`.
+
+### In-world smoke test
+
+```powershell
+.\gradlew.bat -I scripts/smoke.gradle runClient
+.\gradlew.bat -I scripts/smoke.gradle runClient -Pruntime.iris_version=1.11.6+26.3-fabric
+```
+
+Each invocation opens a development client and creates a new disposable world
+under `run/saves/voxy-port-smoke-*`. It checks that Voxy has a renderer after
+400 in-world client ticks, prints `VOXY_PORT_SMOKE_OK`, and closes the client.
+The smoke-test mod is excluded from the normal build. This checks startup,
+world loading and renderer lifetime, not visual correctness or shaderpack compatibility.
+
+See [the Vulkan port assessment](docs/vulkan-port.md) for the remaining rendering work.
diff --git a/build.gradle b/build.gradle
@@ -366,7 +366,7 @@ jar {
     }
 }
 
-project.ext.lwjglVersion = "3.4.1"
+project.ext.lwjglVersion = "3.4.3"
 project.ext.lwjglNatives = "natives-windows"
 
 repositories {
@@ -429,4 +429,4 @@ if (!isInGHA) {
             exclude group: 'net.fabricmc', module: 'fabric-loader'
         }
     }
-}*/
+}*/
diff --git a/docs/vulkan-port.md b/docs/vulkan-port.md
@@ -0,0 +1,46 @@
+# Vulkan port assessment — Minecraft 26.3
+
+Status: **not implemented**. The current 26.3 port renders LoDs with OpenGL.
+The backend check in `VoxyClient.initVoxyClient` prevents OpenGL initialization
+on Vulkan. Disabling Voxy there is not Vulkan rendering support.
+
+## Findings from the 26.3 game sources
+
+Minecraft's graphics classes now live under `com.mojang.renderpearl`.
+The public `api.pipeline.ShaderType` exposes vertex and fragment stages only.
+`api.commands.CommandEncoder` has no compute-dispatch API. Using this API alone
+cannot preserve Voxy's GPU-driven occlusion traversal and indirect draw generation.
+
+The native Vulkan backend has usable starting points: `VulkanDevice.vkDevice()`,
+`vma()`, `graphicsQueue()` and `computeQueue()`. Integrating directly requires
+access to the frontend's backend plus careful coordination with Minecraft's
+command recording, image layouts, submissions and resource lifetime. It is not
+safe to submit independent commands against Minecraft textures without that coordination.
+
+There are 43 production Java files importing LWJGL OpenGL. Key dependencies are:
+
+| Area | Existing implementation | Vulkan work |
+| --- | --- | --- |
+| Buffers, uploads, readbacks | `core/gl`, `UploadStream`, `DownloadStream` | Vulkan/VMA allocations, mapped staging rings and fence-based retirement |
+| Shader compilation | `core/gl/shader` | SPIR-V compilation, descriptor layouts and graphics/compute pipelines |
+| Visibility and LoD traversal | `HierarchicalOcclusionTraverser`, `NodeCleaner`, `AsyncNodeManager` | Compute pipelines, storage buffers, indirect dispatch and explicit barriers |
+| Geometry drawing | `MDICSectionRenderer` | Indexed indirect-count draws, descriptor binding and feature checks |
+| Model atlas and lighting | `SoftwareModelTextureBakery`, `LightMapHelper` | GPU image readback and sampling without OpenGL texture IDs |
+| Depth and compositing | `VoxyRenderSystem`, rendering pipelines, SSAO | Shared depth conventions, render attachments, layout transitions and compute passes |
+| Optional shaders | Iris integration mixins | Separate compatibility work; OpenGL Iris hooks cannot be reused as-is |
+
+## Implementation sequence
+
+1. Introduce an explicit backend boundary for GPU resources and frame execution,
+   retaining the working OpenGL implementation as a regression reference.
+2. Add a Vulkan device bridge and a minimal offscreen triangle test sharing
+   Minecraft's device and submission lifecycle. Check with Vulkan validation layers.
+3. Port buffer allocation, uploads/readbacks and shader compilation; validate a
+   compute dispatch with known input/output before porting the traversal algorithms.
+4. Port the MDIC path and its dependencies (visibility, indirect draw generation,
+   model atlas, lighting, depth pyramid and composition).
+5. Test actual LoD output, world/dimension changes, resizing, resource reloads,
+   shutdown, and GPU-memory lifetime. Only then enable Vulkan as a supported backend.
+
+No Vulkan support claim should be made on the basis of a successful Java build
+or a game launch where Voxy has disabled itself.
diff --git a/gradle.properties b/gradle.properties
@@ -7,31 +7,32 @@ org.gradle.daemon = false
 
 # Fabric Properties
 # check these on https://modmuss50.me/fabric.html
-minecraft_version=26.2
-loader_version=0.19.3
-loom_version=1.16-SNAPSHOT
+minecraft_version=26.3
+loader_version=0.19.5
+loom_version=1.17.21
 
 # Fabric API
-fabric_api_version=0.152.2+26.2
-sodium_version_modrinth=mc26.2-0.9.2-fabric
-#sodium_version=0.9.0-beta.3+mc26.2r1
-sodium_extra_allows=0.9.1
+fabric_api_version=0.160.7+26.3
+sodium_version_modrinth=mc26.3-0.9.2-fabric
+# Only allow the Sodium version used to build this port.
+sodium_extra_allows=
 
 
 #Following modifiers are accepted: compileOnly, runtime
 
-modmenu_version=20.0.0
-lithium_version=mc26.2-0.25.1-fabric
+modmenu_version=21.0.0-beta.1
+lithium_version=mc26.3-0.26.1-fabric
 
-compileOnly.iris_version=1.11.2+26.2-fabric
+compileOnly.iris_version=1.11.6+26.3-fabric
 
-chunky_version=DCgX52a5
+chunky_version=4Eotm6ov
+# Optional integration compile targets; no 26.3 releases were available when porting.
 vivecraft_version=26.2-1.3.12-fabric
 flashback_version=VaqZB1DF
 nvidium_version=0.4.3-beta13-26.1
 
 
 # Mod Properties
-mod_version = 0.2.20-beta
+mod_version = 0.2.20-beta+mc26.3
 maven_group = me.cortex
-archives_base_name = voxy
+archives_base_name = voxy
diff --git a/scripts/smoke.gradle b/scripts/smoke.gradle
@@ -0,0 +1,17 @@
+allprojects {
+    afterEvaluate {
+        def smokeCompile = tasks.register('compilePortSmoke', JavaCompile) {
+            source = fileTree('src/smokeTest/java')
+            classpath = sourceSets.main.compileClasspath + sourceSets.main.output
+            destinationDirectory = layout.buildDirectory.dir('smoke-classes')
+            options.release = 25
+            dependsOn tasks.named('classes')
+        }
+        def smokeResources = tasks.register('copyPortSmoke', Copy) {
+            from 'src/smokeTest/resources'
+            into layout.buildDirectory.dir('smoke-classes')
+        }
+        dependencies.add('runtimeOnly', files(layout.buildDirectory.dir('smoke-classes')))
+        tasks.named('runClient') { dependsOn smokeCompile, smokeResources }
+    }
+}
diff --git a/src/main/java/me/cortex/voxy/client/VoxyClient.java b/src/main/java/me/cortex/voxy/client/VoxyClient.java
@@ -21,6 +21,10 @@ public class VoxyClient implements ClientModInitializer {
     private static final HashSet<String> FREX = new HashSet<>();
     private static FileLock EXCLUSIVE_LOCK;
     public static void initVoxyClient() {
+        if (!"OpenGL".equalsIgnoreCase(com.mojang.blaze3d.systems.RenderSystem.getDevice().getDeviceInfo().backendName())) {
+            Logger.error("Voxy requires the OpenGL renderer; Voxy is disabled on this graphics backend.");
+            return;
+        }
         Capabilities.init();//Ensure clinit is called
 
         if (Capabilities.INSTANCE.hasBrokenDepthSampler) {
@@ -92,4 +96,4 @@ public static int getOcclusionDebugState() {
     public static boolean disableSodiumChunkRender() {
         return false;// getOcclusionDebugState() != 0;
     }
-}
+}
diff --git a/src/main/java/me/cortex/voxy/client/core/RenderProperties.java b/src/main/java/me/cortex/voxy/client/core/RenderProperties.java
@@ -1,7 +1,7 @@
 package me.cortex.voxy.client.core;
 
-import com.mojang.blaze3d.pipeline.DepthStencilState;
-import com.mojang.blaze3d.platform.CompareOp;
+import com.mojang.renderpearl.api.pipeline.DepthStencilState;
+import com.mojang.renderpearl.api.pipeline.CompareOp;
 import com.mojang.blaze3d.systems.RenderSystem;
 import me.cortex.voxy.client.core.gl.shader.Shader;
 import me.cortex.voxy.client.core.util.IrisUtil;

diff --git a/src/main/java/me/cortex/voxy/client/core/VoxyRenderSystem.java b/src/main/java/me/cortex/voxy/client/core/VoxyRenderSystem.java
@@ -1,7 +1,7 @@
 package me.cortex.voxy.client.core;
 
-import com.mojang.blaze3d.opengl.GlConst;
-import com.mojang.blaze3d.opengl.GlStateManager;
+import com.mojang.renderpearl.backend.opengl.GlConst;
+import com.mojang.renderpearl.backend.opengl.GlStateManager;
 import me.cortex.voxy.client.TimingStatistics;
 import me.cortex.voxy.client.VoxyClient;
 import me.cortex.voxy.client.config.VoxyConfig;

diff --git a/src/main/java/me/cortex/voxy/client/core/model/bakery/BakedBlockEntityModel.java b/src/main/java/me/cortex/voxy/client/core/model/bakery/BakedBlockEntityModel.java
@@ -34,7 +34,7 @@ public void render(Matrix4f matrix, int texId) {
                 if (textureId == null) {
                     Logger.error("ERROR: Empty texture id for layer: " + layer);
                 } else {
-                    texId = ((com.mojang.blaze3d.opengl.GlTexture)Minecraft.getInstance().getTextureManager().getTexture(textureId).getTexture()).glId();
+                    texId = ((com.mojang.renderpearl.backend.opengl.GlTexture)Minecraft.getInstance().getTextureManager().getTexture(textureId).getTexture()).glId();
                 }
             }
             if (texId == 0) continue;

diff --git a/src/main/java/me/cortex/voxy/client/core/model/bakery/ReuseVertexConsumer.java b/src/main/java/me/cortex/voxy/client/core/model/bakery/ReuseVertexConsumer.java
@@ -82,6 +82,12 @@ public ReuseVertexConsumer setUv2(int u, int v) {
         return this;
     }
 
+    @Override
+    public ReuseVertexConsumer setUv3(float u, float v) {
+        // Glint coordinates are not used by the block LoD texture baker.
+        return this;
+    }
+
     @Override
     public ReuseVertexConsumer setNormal(float x, float y, float z) {
         return this;
@@ -104,7 +110,8 @@ public ReuseVertexConsumer quad(BakedQuad quad, boolean forceSolid) {
     }
 
     public ReuseVertexConsumer quad(BakedQuad quad, int metadata) {
-        this.anyShaded |= quad.materialInfo().shade();
+        // 26.3 represents unshaded faces with an upward shade direction override.
+        this.anyShaded |= quad.materialInfo().shadeDirectionOverride() != net.minecraft.core.Direction.UP;
         this.anyDarkendTex |= quad.materialInfo().sprite().contents().mipmapStrategy == MipmapStrategy.DARK_CUTOUT;
         this.ensureCanPut();
         for (int i = 0; i < 4; i++) {

diff --git a/src/main/java/me/cortex/voxy/client/core/model/bakery/SoftwareModelTextureBakery.java b/src/main/java/me/cortex/voxy/client/core/model/bakery/SoftwareModelTextureBakery.java
@@ -1,7 +1,7 @@
 package me.cortex.voxy.client.core.model.bakery;
 
-import com.mojang.blaze3d.GpuFormat;
-import com.mojang.blaze3d.opengl.GlTexture;
+import com.mojang.renderpearl.api.GpuFormat;
+import com.mojang.renderpearl.backend.opengl.GlTexture;
 import com.mojang.blaze3d.vertex.PoseStack;
 import me.cortex.voxy.client.core.model.ModelFactory;
 import me.cortex.voxy.common.util.UnsafeUtil;
@@ -293,9 +293,9 @@ public int renderToOutput(BlockState state, long outputBuffer, boolean rasterAsU
     private static void addView(int i, float pitch, float yaw, float rotation, int flip) {
         var stack = new PoseStack();
         stack.translate(0.5f,0.5f,0.5f);
-        stack.mulPose(makeQuatFromAxisExact(new Vector3f(0,0,1), rotation));
-        stack.mulPose(makeQuatFromAxisExact(new Vector3f(1,0,0), pitch));
-        stack.mulPose(makeQuatFromAxisExact(new Vector3f(0,1,0), yaw));
+        stack.rotate(makeQuatFromAxisExact(new Vector3f(0,0,1), rotation));
+        stack.rotate(makeQuatFromAxisExact(new Vector3f(1,0,0), pitch));
+        stack.rotate(makeQuatFromAxisExact(new Vector3f(0,1,0), yaw));
         stack.mulPose(new Matrix4f().scale(1-2*(flip&1), 1-(flip&2), 1-((flip>>1)&2)));
         stack.translate(-0.5f,-0.5f,-0.5f);
         var mat = new Matrix4f(stack.last().pose());

diff --git a/src/main/java/me/cortex/voxy/client/core/rendering/util/LightMapHelper.java b/src/main/java/me/cortex/voxy/client/core/rendering/util/LightMapHelper.java
@@ -27,6 +27,6 @@ public static void bind(int lightingIndex) {
     }
 
     public static int getLightmapTextureId() {
-        return ((com.mojang.blaze3d.opengl.GlTexture)(Minecraft.getInstance().gameRenderer.levelLightmap().texture())).glId();
+        return ((com.mojang.renderpearl.backend.opengl.GlTexture)(Minecraft.getInstance().gameRenderer.levelLightmap().texture())).glId();
     }
 }
diff --git a/src/main/java/me/cortex/voxy/client/mixin/iris/MixinIrisRenderingPipeline.java b/src/main/java/me/cortex/voxy/client/mixin/iris/MixinIrisRenderingPipeline.java
@@ -40,7 +40,7 @@ public class MixinIrisRenderingPipeline implements IGetVoxyPatchData, IGetIrisVo
         }
     }
 
-    @Inject(method = "beginLevelRendering", at = @At(value = "INVOKE", target = "Lcom/mojang/blaze3d/opengl/GlStateManager;_activeTexture(I)V", shift = At.Shift.BEFORE), remap = false)
+    @Inject(method = "beginLevelRendering", at = @At(value = "INVOKE", target = "Lcom/mojang/renderpearl/backend/opengl/GlStateManager;_activeTexture(I)V", shift = At.Shift.BEFORE), remap = false)
     private void voxy$injectViewportSetup(CallbackInfo ci) {
         if (IrisUtil.CAPTURED_VIEWPORT_PARAMETERS != null) {
             var renderer = IVoxyRenderSystemHolder.getNullable();

diff --git a/src/main/java/me/cortex/voxy/client/mixin/iris/MixinLevelRenderer.java b/src/main/java/me/cortex/voxy/client/mixin/iris/MixinLevelRenderer.java
@@ -1,6 +1,6 @@
 package me.cortex.voxy.client.mixin.iris;
 
-import com.mojang.blaze3d.buffers.GpuBufferSlice;
+import com.mojang.renderpearl.api.buffers.GpuBufferSlice;
 import com.mojang.blaze3d.resource.GraphicsResourceAllocator;
 import me.cortex.voxy.client.core.IVoxyRenderSystemHolder;
 import me.cortex.voxy.client.core.util.IrisUtil;
@@ -30,7 +30,7 @@ public class MixinLevelRenderer {
     private GameRenderer gameRenderer;
 
     @Inject(method = "render", at = @At("HEAD"), order = 100)
-    private void voxy$injectIrisCompat(GraphicsResourceAllocator resourceAllocator, DeltaTracker deltaTracker, boolean renderOutline, CameraRenderState cameraState, Matrix4fc modelViewMatrix, GpuBufferSlice terrainFog, Vector4f fogColor, boolean shouldRenderSky, CallbackInfo ci) {
+    private void voxy$injectIrisCompat(GraphicsResourceAllocator resourceAllocator, boolean renderOutline, CameraRenderState cameraState, GpuBufferSlice terrainFog, Vector4f fogColor, boolean shouldRenderSky, boolean consistentDepthRequired, CallbackInfo ci) {
         if (IrisUtil.irisShaderPackEnabled()) {
             var renderer = IVoxyRenderSystemHolder.getNullableHolder();
             if (renderer != null) {

diff --git a/src/main/java/me/cortex/voxy/client/mixin/minecraft/MixinRenderSystem.java b/src/main/java/me/cortex/voxy/client/mixin/minecraft/MixinRenderSystem.java
@@ -1,7 +1,7 @@
 package me.cortex.voxy.client.mixin.minecraft;
 
 
-import com.mojang.blaze3d.systems.GpuDevice;
+import com.mojang.renderpearl.api.device.GpuDevice;
 import com.mojang.blaze3d.systems.RenderSystem;
 import me.cortex.voxy.client.VoxyClient;
 import org.spongepowered.asm.mixin.Mixin;

diff --git a/src/main/java/me/cortex/voxy/client/mixin/minecraft/util/MixinGlDebug.java b/src/main/java/me/cortex/voxy/client/mixin/minecraft/util/MixinGlDebug.java
@@ -2,7 +2,7 @@
 
 import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
 import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
-import com.mojang.blaze3d.opengl.GlDebug;
+import com.mojang.renderpearl.backend.opengl.GlDebug;
 import me.cortex.voxy.client.core.gl.Capabilities;
 import org.slf4j.Logger;
 import org.spongepowered.asm.mixin.Mixin;

diff --git a/src/main/java/me/cortex/voxy/client/mixin/nvidium/MixinRenderPipeline.java b/src/main/java/me/cortex/voxy/client/mixin/nvidium/MixinRenderPipeline.java
@@ -1,7 +1,7 @@
 package me.cortex.voxy.client.mixin.nvidium;
 
-import com.mojang.blaze3d.opengl.GlTextureView;
-import com.mojang.blaze3d.textures.GpuSampler;
+import com.mojang.renderpearl.backend.opengl.GlTextureView;
+import com.mojang.renderpearl.api.textures.GpuSampler;
 import me.cortex.nvidium.RenderPipeline;
 import me.cortex.voxy.client.core.IVoxyRenderSystemHolder;
 import net.caffeinemc.mods.sodium.client.render.chunk.ChunkRenderMatrices;

diff --git a/src/main/java/me/cortex/voxy/client/mixin/sodium/MixinDefaultChunkRenderer.java b/src/main/java/me/cortex/voxy/client/mixin/sodium/MixinDefaultChunkRenderer.java
@@ -1,9 +1,11 @@
 package me.cortex.voxy.client.mixin.sodium;
 
-import com.mojang.blaze3d.buffers.GpuBuffer;
-import com.mojang.blaze3d.buffers.GpuBufferSlice;
-import com.mojang.blaze3d.opengl.GlTextureView;
-import com.mojang.blaze3d.textures.GpuSampler;
+import com.mojang.renderpearl.api.buffers.GpuBuffer;
+import com.mojang.renderpearl.api.commands.RenderPass;
+import net.minecraft.client.renderer.oit.OitStage;
+import com.mojang.renderpearl.api.buffers.GpuBufferSlice;
+import com.mojang.renderpearl.backend.opengl.GlTextureView;
+import com.mojang.renderpearl.api.textures.GpuSampler;
 import me.cortex.voxy.client.VoxyClient;
 import me.cortex.voxy.client.core.IVoxyRenderSystemHolder;
 import me.cortex.voxy.client.core.rendering.Viewport;
@@ -31,17 +33,17 @@ public MixinDefaultChunkRenderer(ChunkVertexType vertexType) {
     }
 
     @Inject(method = "render", at = @At(value = "HEAD"), cancellable = true)
-    private void voxy$cancelThingie(ChunkRenderMatrices matrices, ChunkRenderListIterable renderLists, TerrainRenderPass renderPass, CameraTransform camera, FogParameters parameters, boolean indexedRenderingEnabled, GpuSampler terrainSampler, GpuBufferSlice uniformData, GpuBuffer sectionTimeInfo, CallbackInfo ci) {
+    private void voxy$cancelThingie(ChunkRenderMatrices matrices, ChunkRenderListIterable renderLists, TerrainRenderPass renderPass, CameraTransform camera, FogParameters parameters, boolean indexedRenderingEnabled, RenderPass pass, GpuSampler terrainSampler, GpuBufferSlice uniformData, GpuBuffer sectionTimeInfo, OitStage oitStage, CallbackInfo ci) {
         if (VoxyClient.disableSodiumChunkRender()) {
-            super.begin(renderPass, parameters, terrainSampler);
+            super.begin(renderPass, parameters, terrainSampler, oitStage);
             this.doRender(matrices, renderPass, camera, parameters);
             super.end(renderPass);
             ci.cancel();
         }
     }
 
     @Inject(method = "render", at = @At(value = "INVOKE", target = "Lnet/caffeinemc/mods/sodium/client/render/chunk/ShaderChunkRenderer;end(Lnet/caffeinemc/mods/sodium/client/render/chunk/terrain/TerrainRenderPass;)V", shift = At.Shift.BEFORE))
-    private void voxy$injectRender(ChunkRenderMatrices matrices, ChunkRenderListIterable renderLists, TerrainRenderPass renderPass, CameraTransform camera, FogParameters parameters, boolean indexedRenderingEnabled, GpuSampler terrainSampler, GpuBufferSlice uniformData, GpuBuffer sectionTimeInfo, CallbackInfo ci) {
+    private void voxy$injectRender(ChunkRenderMatrices matrices, ChunkRenderListIterable renderLists, TerrainRenderPass renderPass, CameraTransform camera, FogParameters parameters, boolean indexedRenderingEnabled, RenderPass pass, GpuSampler terrainSampler, GpuBufferSlice uniformData, GpuBuffer sectionTimeInfo, OitStage oitStage, CallbackInfo ci) {
         this.doRender(matrices, renderPass, camera, parameters);
     }
 

diff --git a/src/main/java/me/cortex/voxy/client/taskbar/WindowsTaskbar.java b/src/main/java/me/cortex/voxy/client/taskbar/WindowsTaskbar.java
@@ -4,11 +4,18 @@
 import com.sun.jna.platform.win32.COM.COMInvoker;
 import com.sun.jna.platform.win32.*;
 import com.sun.jna.ptr.PointerByReference;
-import org.lwjgl.glfw.GLFWNativeWin32;
+import static org.lwjgl.sdl.SDLProperties.SDL_GetPointerProperty;
+import static org.lwjgl.sdl.SDLVideo.SDL_GetWindowProperties;
+import static org.lwjgl.sdl.SDLVideo.SDL_PROP_WINDOW_WIN32_HWND_POINTER;
 
 public class WindowsTaskbar extends COMInvoker implements Taskbar.ITaskbar {
     private final WinDef.HWND hwnd;
     WindowsTaskbar(long windowId) {
+        long nativeWindow = SDL_GetPointerProperty(SDL_GetWindowProperties(windowId),
+                SDL_PROP_WINDOW_WIN32_HWND_POINTER, 0);
+        if (nativeWindow == 0) {
+            throw new IllegalStateException("SDL window has no Win32 handle");
+        }
         var itaskbar3res = new PointerByReference();
 
         if (W32Errors.FAILED(Ole32.INSTANCE.CoCreateInstance(new Guid.GUID("56FDF344-FD6D-11d0-958A-006097C9A090"),
@@ -20,7 +27,7 @@ public class WindowsTaskbar extends COMInvoker implements Taskbar.ITaskbar {
         }
 
         this.setPointer(itaskbar3res.getValue());
-        this.hwnd = new WinDef.HWND(new Pointer(GLFWNativeWin32.glfwGetWin32Window(windowId)));
+        this.hwnd = new WinDef.HWND(new Pointer(nativeWindow));
 
         this.invokeNative(3); // HrInit
     }