diff --git a/jme3-android/src/main/java/com/jme3/audio/android/AndroidAudioData.java b/jme3-android/src/main/java/com/jme3/audio/android/AndroidAudioData.java
index e7f4a0f98f..3bd4a3b378 100644
--- a/jme3-android/src/main/java/com/jme3/audio/android/AndroidAudioData.java
+++ b/jme3-android/src/main/java/com/jme3/audio/android/AndroidAudioData.java
@@ -38,8 +38,8 @@ public float getDuration() {
 
     @Override
     public void resetObject() {
-        this.id = -1;
-        setUpdateNeeded();  
+        invalidate();
+        setUpdateNeeded();
     }
 
     @Override
@@ -57,11 +57,11 @@ public void setCurrentVolume(float currentVolume) {
 
     @Override
     public NativeObject createDestructableClone() {
-        return new AndroidAudioData(id);
+        return new AndroidAudioData(getId());
     }
 
     @Override
     public long getUniqueId() {
-        return ((long)OBJTYPE_AUDIOBUFFER << 32) | ((long)id);
+        return ((long)OBJTYPE_AUDIOBUFFER << 32) | (getId());
     }
 }
diff --git a/jme3-core/src/main/java/com/jme3/audio/AudioBuffer.java b/jme3-core/src/main/java/com/jme3/audio/AudioBuffer.java
index 249d9601eb..ba3e53093a 100644
--- a/jme3-core/src/main/java/com/jme3/audio/AudioBuffer.java
+++ b/jme3-core/src/main/java/com/jme3/audio/AudioBuffer.java
@@ -80,7 +80,7 @@ public float getDuration() {
     @Override
     public String toString() {
         return getClass().getSimpleName()
-                + "[id=" + id + ", ch=" + channels + ", bits=" + bitsPerSample
+                + "[id=" + getId() + ", ch=" + channels + ", bits=" + bitsPerSample
                 + ", rate=" + sampleRate + ", duration=" + getDuration() + "]";
     }
 
@@ -109,7 +109,7 @@ public ByteBuffer getData() {
 
     @Override
     public void resetObject() {
-        id = -1;
+        invalidate();
         setUpdateNeeded();
     }
 
@@ -127,11 +127,11 @@ public void deleteObject(Object rendererObject) {
 
     @Override
     public NativeObject createDestructableClone() {
-        return new AudioBuffer(id);
+        return new AudioBuffer(getId());
     }
 
     @Override
     public long getUniqueId() {
-        return ((long) OBJTYPE_AUDIOBUFFER << 32) | (0xffffffffL & (long) id);
+        return ((long) OBJTYPE_AUDIOBUFFER << 32) | (0xffffffffL & getId());
     }
 }
diff --git a/jme3-core/src/main/java/com/jme3/audio/AudioData.java b/jme3-core/src/main/java/com/jme3/audio/AudioData.java
index 6a0f1953aa..31cab90000 100644
--- a/jme3-core/src/main/java/com/jme3/audio/AudioData.java
+++ b/jme3-core/src/main/java/com/jme3/audio/AudioData.java
@@ -98,7 +98,7 @@ public int getSampleRate() {
      * @param sampleRate Sample rate, 44100, 22050, etc.
      */
     public void setupFormat(int channels, int bitsPerSample, int sampleRate) {
-        if (id != -1)
+        if (isValid())
             throw new IllegalStateException("Already set up");
 
         this.channels = channels;
diff --git a/jme3-core/src/main/java/com/jme3/audio/AudioStream.java b/jme3-core/src/main/java/com/jme3/audio/AudioStream.java
index 15b40c5b43..4c7bb6c714 100644
--- a/jme3-core/src/main/java/com/jme3/audio/AudioStream.java
+++ b/jme3-core/src/main/java/com/jme3/audio/AudioStream.java
@@ -68,7 +68,7 @@ protected AudioStream(int[] ids) {
     }
 
     public void updateData(InputStream in, float duration) {
-        if (id != -1 || this.in != null) {
+        if (isValid() || this.in != null) {
             throw new IllegalStateException("Data already set!");
         }
 
@@ -157,8 +157,7 @@ public DataType getDataType() {
 
     @Override
     public void resetObject() {
-        id = -1;
-        ids = null;
+        invalidate();
         setUpdateNeeded();
     }
 
@@ -222,6 +221,6 @@ public void setTime(float time) {
 
     @Override
     public long getUniqueId() {
-        return ((long) OBJTYPE_AUDIOSTREAM << 32) | (0xffffffffL & (long) ids[0]);
+        return ((long) OBJTYPE_AUDIOSTREAM << 32) | (0xffffffffL & ids[0]);
     }
 }
diff --git a/jme3-core/src/main/java/com/jme3/audio/Filter.java b/jme3-core/src/main/java/com/jme3/audio/Filter.java
index 83bc99e753..dbf426de3f 100644
--- a/jme3-core/src/main/java/com/jme3/audio/Filter.java
+++ b/jme3-core/src/main/java/com/jme3/audio/Filter.java
@@ -59,7 +59,7 @@ public void read(JmeImporter im) throws IOException {
 
     @Override
     public void resetObject() {
-        this.id = -1;
+        invalidate();
         setUpdateNeeded();
     }
 
diff --git a/jme3-core/src/main/java/com/jme3/audio/LowPassFilter.java b/jme3-core/src/main/java/com/jme3/audio/LowPassFilter.java
index daa49adb65..5f13ff21d0 100644
--- a/jme3-core/src/main/java/com/jme3/audio/LowPassFilter.java
+++ b/jme3-core/src/main/java/com/jme3/audio/LowPassFilter.java
@@ -94,11 +94,11 @@ public void read(JmeImporter im) throws IOException {
 
     @Override
     public NativeObject createDestructableClone() {
-        return new LowPassFilter(id);
+        return new LowPassFilter(getId());
     }
 
     @Override
     public long getUniqueId() {
-        return ((long) OBJTYPE_FILTER << 32) | (0xffffffffL & (long) id);
+        return ((long) OBJTYPE_FILTER << 32) | (0xffffffffL & getId());
     }
 }
diff --git a/jme3-core/src/main/java/com/jme3/audio/openal/ALAudioRenderer.java b/jme3-core/src/main/java/com/jme3/audio/openal/ALAudioRenderer.java
index 834d80eca1..fc19608758 100644
--- a/jme3-core/src/main/java/com/jme3/audio/openal/ALAudioRenderer.java
+++ b/jme3-core/src/main/java/com/jme3/audio/openal/ALAudioRenderer.java
@@ -292,7 +292,7 @@ public void cleanup() {
 
     private void updateFilter(Filter f) {
         int id = f.getId();
-        if (id == -1) {
+        if (f.isInvalid()) {
             ib.position(0).limit(1);
             efx.alGenFilters(1, ib);
             id = ib.get(0);
diff --git a/jme3-core/src/main/java/com/jme3/renderer/opengl/GLRenderer.java b/jme3-core/src/main/java/com/jme3/renderer/opengl/GLRenderer.java
index 82bcca3a4f..696ed872a4 100644
--- a/jme3-core/src/main/java/com/jme3/renderer/opengl/GLRenderer.java
+++ b/jme3-core/src/main/java/com/jme3/renderer/opengl/GLRenderer.java
@@ -1453,7 +1453,7 @@ public int convertShaderType(ShaderType type) {
 
     public void updateShaderSourceData(ShaderSource source) {
         int id = source.getId();
-        if (id == -1) {
+        if (source.isInvalid()) {
             // Create id
             id = gl.glCreateShader(convertShaderType(source.getType()));
             if (id <= 0) {
@@ -1588,7 +1588,7 @@ public void updateShaderSourceData(ShaderSource source) {
     public void updateShaderData(Shader shader) {
         int id = shader.getId();
         boolean needRegister = false;
-        if (id == -1) {
+        if (shader.isInvalid()) {
             // create program
             id = gl.glCreateProgram();
             if (id == 0) {
@@ -1972,7 +1972,7 @@ public void updateFrameBuffer(FrameBuffer fb) {
         }
 
         int id = fb.getId();
-        if (id == -1) {
+        if (fb.isInvalid()) {
             glfbo.glGenFramebuffersEXT(intBuf1);
             id = intBuf1.get(0);
             fb.setId(id);
@@ -2503,7 +2503,7 @@ private void bindTextureOnly(int target, Image img, int unit) {
      */
     public void updateTexImageData(Image img, Texture.Type type, int unit, boolean scaleToPot) {
         int texId = img.getId();
-        if (texId == -1) {
+        if (img.isInvalid()) {
             // create texture
             gl.glGenTextures(intBuf1);
             texId = intBuf1.get(0);
@@ -2774,7 +2774,7 @@ private int convertFormat(Format format) {
     public void updateBufferData(VertexBuffer vb) {
         int bufId = vb.getId();
         boolean created = false;
-        if (bufId == -1) {
+        if (vb.isInvalid()) {
             // create buffer
             gl.glGenBuffers(intBuf1);
             bufId = intBuf1.get(0);
diff --git a/jme3-core/src/main/java/com/jme3/scene/VertexBuffer.java b/jme3-core/src/main/java/com/jme3/scene/VertexBuffer.java
index 8c0a388bb7..e33a3ba1b3 100644
--- a/jme3-core/src/main/java/com/jme3/scene/VertexBuffer.java
+++ b/jme3-core/src/main/java/com/jme3/scene/VertexBuffer.java
@@ -647,7 +647,7 @@ public int getBaseInstanceCount() {
      * argument.
      */
     public void setupData(Usage usage, int components, Format format, Buffer data) {
-        if (id != -1) {
+        if (isValid()) {
             throw new UnsupportedOperationException("Data has already been sent. Cannot setupData again.");
         }
 
@@ -690,7 +690,7 @@ public void setupData(Usage usage, int components, Format format, Buffer data) {
      * @param data The data buffer to set
      */
     public void updateData(Buffer data) {
-        if (id != -1) {
+        if (isValid()) {
             // request to update data is okay
         }
 
@@ -730,7 +730,7 @@ public void clearUpdateNeeded() {
      * Converts single floating-point data to {@link Format#Half half} floating-point data.
      */
     public void convertToHalf() {
-        if (id != -1) {
+        if (isValid()) {
             throw new UnsupportedOperationException("Data has already been sent.");
         }
 
@@ -1037,7 +1037,7 @@ public VertexBuffer clone() {
         // e.g. re-use ID.
         VertexBuffer vb = (VertexBuffer) super.clone();
         vb.handleRef = new Object();
-        vb.id = -1;
+        vb.invalidate();
         if (data != null) {
             // Make sure to pass a read-only buffer to clone so that
             // the position information doesn't get clobbered by another
@@ -1068,7 +1068,7 @@ public VertexBuffer clone(Type overrideType) {
         vb.data = BufferUtils.clone(getDataReadOnly());
         vb.format = format;
         vb.handleRef = new Object();
-        vb.id = -1;
+        vb.invalidate();
         vb.normalized = normalized;
         vb.instanceSpan = instanceSpan;
         vb.offset = offset;
@@ -1092,8 +1092,8 @@ public String toString() {
 
     @Override
     public void resetObject() {
-//        assert this.id != -1;
-        this.id = -1;
+//        assert isValid
+        invalidate();
         setUpdateNeeded();
     }
 
@@ -1111,12 +1111,12 @@ protected void deleteNativeBuffers() {
 
     @Override
     public NativeObject createDestructableClone() {
-        return new VertexBuffer(id);
+        return new VertexBuffer(getId());
     }
 
     @Override
     public long getUniqueId() {
-        return ((long) OBJTYPE_VERTEXBUFFER << 32) | (0xffffffffL & (long) id);
+        return ((long) OBJTYPE_VERTEXBUFFER << 32) | (0xffffffffL & getId());
     }
 
     @Override
diff --git a/jme3-core/src/main/java/com/jme3/shader/BufferObject.java b/jme3-core/src/main/java/com/jme3/shader/BufferObject.java
index b893576a87..ef7750e972 100644
--- a/jme3-core/src/main/java/com/jme3/shader/BufferObject.java
+++ b/jme3-core/src/main/java/com/jme3/shader/BufferObject.java
@@ -248,7 +248,7 @@ public int getBinding() {
 
     @Override
     public void resetObject() {
-        this.id = -1;
+        invalidate();
         setUpdateNeeded();
     }
 
@@ -829,6 +829,6 @@ protected void deleteNativeBuffers() {
 
     @Override
     public long getUniqueId() {
-        return ((long) OBJTYPE_BO << 32) | (0xffffffffL & (long) id);
+        return ((long) OBJTYPE_BO << 32) | (0xffffffffL & getId());
     }
 }
diff --git a/jme3-core/src/main/java/com/jme3/shader/Shader.java b/jme3-core/src/main/java/com/jme3/shader/Shader.java
index eb2f778d39..dbac48cd9a 100644
--- a/jme3-core/src/main/java/com/jme3/shader/Shader.java
+++ b/jme3-core/src/main/java/com/jme3/shader/Shader.java
@@ -130,7 +130,7 @@ public ShaderSource(ShaderType type) {
         }
 
         protected ShaderSource(ShaderSource ss) {
-            super(ss.id);
+            super(ss.getId());
             // No data needs to be copied.
             // (This is a destructible clone)
         }
@@ -189,7 +189,7 @@ public String getDefines() {
 
         @Override
         public long getUniqueId() {
-            return ((long)OBJTYPE_SHADERSOURCE << 32) | (0xffffffffL & (long)id);
+            return ((long)OBJTYPE_SHADERSOURCE << 32) | (0xffffffffL & getId());
         }
 
         @Override
@@ -207,7 +207,7 @@ public String toString() {
 
         @Override
         public void resetObject() {
-            id = -1;
+            invalidate();
             setUpdateNeeded();
         }
 
@@ -241,7 +241,7 @@ public Shader() {
      * @param s (not null)
      */
     protected Shader(Shader s) {
-        super(s.id);
+        super(s.getId());
 
         // Shader sources cannot be shared, therefore they must
         // be destroyed together with the parent shader.
@@ -443,7 +443,7 @@ public void setUpdateNeeded(){
      */
     @Override
     public void resetObject() {
-        this.id = -1;
+        invalidate();
         for (ShaderSource source : shaderSourceList){
             source.resetObject();
         }
@@ -462,6 +462,6 @@ public NativeObject createDestructableClone(){
 
     @Override
     public long getUniqueId() {
-        return ((long)OBJTYPE_SHADER << 32) | (0xffffffffL & (long)id);
+        return ((long)OBJTYPE_SHADER << 32) | (0xffffffffL & getId());
     }
 }
diff --git a/jme3-core/src/main/java/com/jme3/texture/FrameBuffer.java b/jme3-core/src/main/java/com/jme3/texture/FrameBuffer.java
index 7153f8200f..3b7b4000c8 100644
--- a/jme3-core/src/main/java/com/jme3/texture/FrameBuffer.java
+++ b/jme3-core/src/main/java/com/jme3/texture/FrameBuffer.java
@@ -346,7 +346,7 @@ public FrameBuffer(int width, int height, int samples) {
     }
 
     protected FrameBuffer(FrameBuffer src) {
-        super(src.id);
+        super(src.getId());
         /*
         for (RenderBuffer renderBuf : src.colorBufs){
             RenderBuffer clone = renderBuf.createDestructableClone();
@@ -367,7 +367,7 @@ protected FrameBuffer(FrameBuffer src) {
      */
     @Deprecated
     public void setDepthBuffer(Image.Format format) {
-        if (id != -1) {
+        if (isValid()) {
             throw new UnsupportedOperationException("FrameBuffer already initialized.");
         }
 
@@ -389,7 +389,7 @@ public void setDepthBuffer(Image.Format format) {
      */
     @Deprecated 
     public void setColorBuffer(Image.Format format) {
-        if (id != -1) {
+        if (isValid()) {
             throw new UnsupportedOperationException("FrameBuffer already initialized.");
         }
 
@@ -551,7 +551,7 @@ public void clearColorTargets() {
      */
     @Deprecated
     public void addColorBuffer(Image.Format format) {
-        if (id != -1) {
+        if (isValid()) {
             throw new UnsupportedOperationException("FrameBuffer already initialized.");
         }
 
@@ -579,7 +579,7 @@ public void addColorBuffer(Image.Format format) {
      */
     @Deprecated
     public void addColorTexture(Texture2D tex) {
-        if (id != -1) {
+        if (isValid()) {
             throw new UnsupportedOperationException("FrameBuffer already initialized.");
         }
 
@@ -607,7 +607,7 @@ public void addColorTexture(Texture2D tex) {
      */
     @Deprecated
     public void addColorTexture(TextureArray tex, int layer) {
-        if (id != -1) {
+        if (isValid()) {
             throw new UnsupportedOperationException("FrameBuffer already initialized.");
         }
 
@@ -636,7 +636,7 @@ public void addColorTexture(TextureArray tex, int layer) {
      */
     @Deprecated
     public void addColorTexture(TextureCubeMap tex, TextureCubeMap.Face face) {
-        if (id != -1) {
+        if (isValid()) {
             throw new UnsupportedOperationException("FrameBuffer already initialized.");
         }
 
@@ -660,7 +660,7 @@ public void addColorTexture(TextureCubeMap tex, TextureCubeMap.Face face) {
      */
     @Deprecated
     public void setDepthTexture(Texture2D tex) {
-        if (id != -1) {
+        if (isValid()) {
             throw new UnsupportedOperationException("FrameBuffer already initialized.");
         }
 
@@ -681,7 +681,7 @@ public void setDepthTexture(Texture2D tex) {
      */
     @Deprecated
     public void setDepthTexture(TextureArray tex, int layer) {
-        if (id != -1) {
+        if (isValid()) {
             throw new UnsupportedOperationException("FrameBuffer already initialized.");
         }
 
@@ -781,7 +781,7 @@ public String toString() {
 
     @Override
     public void resetObject() {
-        this.id = -1;
+        invalidate();
 
         for (int i = 0; i < colorBufs.size(); i++) {
             colorBufs.get(i).resetObject();
@@ -806,7 +806,7 @@ public NativeObject createDestructableClone() {
 
     @Override
     public long getUniqueId() {
-        return ((long) OBJTYPE_FRAMEBUFFER << 32) | (0xffffffffL & (long) id);
+        return ((long) OBJTYPE_FRAMEBUFFER << 32) | (0xffffffffL & getId());
     }
 
     /**
diff --git a/jme3-core/src/main/java/com/jme3/texture/Image.java b/jme3-core/src/main/java/com/jme3/texture/Image.java
index 4f576b810c..4bd2b8ff6a 100644
--- a/jme3-core/src/main/java/com/jme3/texture/Image.java
+++ b/jme3-core/src/main/java/com/jme3/texture/Image.java
@@ -673,7 +673,7 @@ public boolean isNPOT() {
     
     @Override
     public void resetObject() {
-        this.id = -1;
+        invalidate();
         this.mipsWereGenerated = false;
         this.lastTextureState.reset();
         setUpdateNeeded();
@@ -693,12 +693,12 @@ public void deleteObject(Object rendererObject) {
 
     @Override
     public NativeObject createDestructableClone() {
-        return new Image(id);
+        return new Image(getId());
     }
 
     @Override
     public long getUniqueId() {
-        return ((long)OBJTYPE_TEXTURE << 32) | (0xffffffffL & (long)id);
+        return ((long)OBJTYPE_TEXTURE << 32) | (0xffffffffL & getId());
     }
     
     /**
@@ -1203,7 +1203,7 @@ public String toString(){
             sb.append(", mips");
 
         if (getId() >= 0)
-            sb.append(", id=").append(id);
+            sb.append(", id=").append(getId());
 
         sb.append("]");
         
diff --git a/jme3-core/src/main/java/com/jme3/util/NativeObject.java b/jme3-core/src/main/java/com/jme3/util/NativeObject.java
index c7ff725294..5c73cd155a 100644
--- a/jme3-core/src/main/java/com/jme3/util/NativeObject.java
+++ b/jme3-core/src/main/java/com/jme3/util/NativeObject.java
@@ -44,8 +44,9 @@
  */
 public abstract class NativeObject implements Cloneable {
 
-    public static final int INVALID_ID = -1;
-    
+    //can be anything since its not used for validity
+    private static final int INVALID_ID = 0;
+
     protected static final int OBJTYPE_VERTEXBUFFER = 1,
                                OBJTYPE_TEXTURE      = 2,
                                OBJTYPE_FRAMEBUFFER  = 3,
@@ -65,7 +66,14 @@ public abstract class NativeObject implements Cloneable {
      * The ID of the object, usually depends on its type.
      * Typically returned from calls like glGenTextures, glGenBuffers, etc.
      */
-    protected int id = INVALID_ID;
+    private int id = INVALID_ID;
+
+    /**
+     * indicates if this object is valid, replaces using -1 for the id since in some cases, -1 is a
+     * valid id.
+     */
+
+    private boolean valid;
 
     /**
      * A reference to a "handle". By hard referencing a certain object, it's
@@ -98,6 +106,7 @@ public NativeObject(){
      */
     protected NativeObject(int id){
         this.id = id;
+        this.valid = true;
     }
 
     void setNativeObjectManager(NativeObjectManager objectManager) {
@@ -111,10 +120,11 @@ void setNativeObjectManager(NativeObjectManager objectManager) {
      * @param id The ID to set
      */
     public void setId(int id){
-        if (this.id != INVALID_ID) {
+        if (isValid()) {
             throw new IllegalStateException("ID has already been set for this GL object.");
         }
         this.id = id;
+        this.valid = true;
     }
 
     /**
@@ -249,4 +259,17 @@ public <T> WeakReference<T> getWeakRef() {
         }
         return (WeakReference<T>) weakRef;
     }
+
+    public boolean isValid() {
+        return valid;
+    }
+
+    public boolean isInvalid() {
+        return !valid;
+    }
+
+    public void invalidate() {
+        this.id = INVALID_ID;
+        valid = false;
+    }
 }
diff --git a/jme3-core/src/main/java/com/jme3/util/NativeObjectManager.java b/jme3-core/src/main/java/com/jme3/util/NativeObjectManager.java
index c35b91145d..f56b3245c7 100644
--- a/jme3-core/src/main/java/com/jme3/util/NativeObjectManager.java
+++ b/jme3-core/src/main/java/com/jme3/util/NativeObjectManager.java
@@ -102,8 +102,8 @@ public NativeObjectRef(ReferenceQueue<Object> refQueue, NativeObject obj){
      * @param obj the object to register (not null)
      */
     public void registerObject(NativeObject obj) {
-        if (obj.getId() <= 0) {
-            throw new IllegalArgumentException("object id must be greater than zero");
+        if (obj.isInvalid()) {
+            throw new IllegalArgumentException("object is not valid");
         }
 
         NativeObjectRef ref = new NativeObjectRef(refQueue, obj);
@@ -129,8 +129,8 @@ private void deleteNativeObject(Object rendererObject, NativeObject obj, NativeO
         assert realObj == null || obj.getId() == realObj.getId();
         
         if (deleteGL) {
-            if (obj.getId() <= 0) {
-                logger.log(Level.WARNING, "Object already deleted: {0}", obj.getClass().getSimpleName() + "/" + obj.getId());
+            if (obj.isInvalid()) {
+                logger.log(Level.WARNING, "Object already deleted: {0}", obj.getClass().getSimpleName());
             } else {
                 // Unregister it from cleanup list.
                 NativeObjectRef ref2 = refMap.remove(obj.getUniqueId());
@@ -146,7 +146,7 @@ private void deleteNativeObject(Object rendererObject, NativeObject obj, NativeO
 
                 // Delete object from the GL driver
                 obj.deleteObject(rendererObject);
-                assert obj.getId() == NativeObject.INVALID_ID;
+                assert obj.isInvalid();
 
                 if (logger.isLoggable(Level.FINEST)) {
                     logger.log(Level.FINEST, "Deleted: {0}", obj.getClass().getSimpleName() + "/" + id);
diff --git a/jme3-lwjgl/src/main/java/com/jme3/opencl/lwjgl/LwjglContext.java b/jme3-lwjgl/src/main/java/com/jme3/opencl/lwjgl/LwjglContext.java
index e95a2a56d0..9f66594d92 100644
--- a/jme3-lwjgl/src/main/java/com/jme3/opencl/lwjgl/LwjglContext.java
+++ b/jme3-lwjgl/src/main/java/com/jme3/opencl/lwjgl/LwjglContext.java
@@ -151,13 +151,12 @@ public ImageFormat[] querySupportedFormats(MemoryAccess access, Image.ImageType
 
     @Override
     public Buffer bindVertexBuffer(VertexBuffer vb, MemoryAccess access) {
-        int id = vb.getId();
-        if (id == -1) {
+        if (vb.isInvalid()) {
             throw new IllegalArgumentException("vertex buffer was not yet uploaded to the GPU or is CPU only");
         }
         long flags = Utils.getMemoryAccessFlags(access);
         Utils.errorBuffer.rewind();
-        CLMem mem = CL10GL.clCreateFromGLBuffer(context, flags, id, Utils.errorBuffer);
+        CLMem mem = CL10GL.clCreateFromGLBuffer(context, flags, vb.getId(), Utils.errorBuffer);
         Utils.checkError(Utils.errorBuffer, "clCreateFromGLBuffer");
         return new LwjglBuffer(mem);
     }
@@ -165,7 +164,7 @@ public Buffer bindVertexBuffer(VertexBuffer vb, MemoryAccess access) {
     @Override
     public Image bindImage(com.jme3.texture.Image image, Texture.Type textureType, int mipLevel, MemoryAccess access) {
         int imageID = image.getId();
-        if (imageID == -1) {
+        if (image.isInvalid()) {
             throw new IllegalArgumentException("image was not yet uploaded to the GPU");
         }
         long memFlags = Utils.getMemoryAccessFlags(access);
diff --git a/jme3-lwjgl3/src/main/java/com/jme3/opencl/lwjgl/LwjglContext.java b/jme3-lwjgl3/src/main/java/com/jme3/opencl/lwjgl/LwjglContext.java
index 8fef7ad1f1..4cc8023f38 100644
--- a/jme3-lwjgl3/src/main/java/com/jme3/opencl/lwjgl/LwjglContext.java
+++ b/jme3-lwjgl3/src/main/java/com/jme3/opencl/lwjgl/LwjglContext.java
@@ -162,13 +162,12 @@ public ImageFormat[] querySupportedFormats(MemoryAccess access, Image.ImageType
     @Override
     public Buffer bindVertexBuffer(VertexBuffer vb, MemoryAccess access) {
         Utils.assertSharingPossible();
-        int id = vb.getId();
-        if (id == -1) {
+        if (vb.isInvalid()) {
             throw new IllegalArgumentException("vertex buffer was not yet uploaded to the GPU or is CPU only");
         }
         long flags = Utils.getMemoryAccessFlags(access);
         Utils.errorBuffer.rewind();
-        long mem = CL10GL.clCreateFromGLBuffer(context, flags, id, Utils.errorBuffer);
+        long mem = CL10GL.clCreateFromGLBuffer(context, flags, vb.getId(), Utils.errorBuffer);
         Utils.checkError(Utils.errorBuffer, "clCreateFromGLBuffer");
         return new LwjglBuffer(mem);
     }