Transparency problem

I had some problems with transparency and I made some test. Here is the code:



import com.jme3.app.SimpleApplication;

import com.jme3.font.BitmapText;

import com.jme3.light.DirectionalLight;

import com.jme3.material.Material;

import com.jme3.material.RenderState.BlendMode;

import com.jme3.math.ColorRGBA;

import com.jme3.math.Vector3f;

import com.jme3.renderer.queue.RenderQueue.Bucket;

import com.jme3.scene.Geometry;

import com.jme3.scene.Mesh;

import com.jme3.scene.shape.Sphere;



public final class MyMaterialTest extends SimpleApplication

{

protected static final Mesh SPHERE_MESH = new Sphere(30, 30, 10);



public static void main(String[] args)

{

MyMaterialTest app = new MyMaterialTest();

app.start();

}



@Override

public void simpleInitApp()

{

Material mat_tl = new Material(assetManager, “Common/MatDefs/Misc/SolidColor.j3md”);

ColorRGBA sphereColor = ColorRGBA.White.clone();

sphereColor.a = 0.25f;

mat_tl.setColor(“m_Color”, sphereColor);

mat_tl.getAdditionalRenderState().setBlendMode(BlendMode.Alpha);



Geometry geom = new Geometry(“Sphere”, SPHERE_MESH);

geom.setMaterial(mat_tl);

geom.setQueueBucket(Bucket.Transparent);

geom.setLocalTranslation(Vector3f.ZERO);

rootNode.attachChild(geom);



BitmapText txt = new BitmapText(guiFont, false);

txt.setColor(ColorRGBA.White);

txt.setSize(4f);

txt.setText(“JME”);

txt.setQueueBucket(Bucket.Transparent);

txt.updateLogicalState(0); // TODO remove if fixed in JME3

txt.setLocalTranslation(-txt.getLineWidth() / 2, txt.getLineHeight() / 2, 0);

rootNode.attachChild(txt);



cam.setLocation(new Vector3f(40, 40, 100));

cam.lookAt(Vector3f.ZERO, Vector3f.UNIT_Y.clone());

flyCam.setMoveSpeed(40);

}

}





If you move camera around a little (especially to the left) you can see that the text disappears on some camera positions and I don’t have a clue why. Its logical that disappears if you move camera behind it, but not in front.

I suspect this is highly connected with my other problem which I had in JME2:

http://hub.jmonkeyengine.org/groups/general-2/forum/topic/important-rendererqueue_transparent-issue-video/.

I would be really glad if anyone would know something about this strange problem…