LibGDX decals transparent

Newbie & Debugging Questions
#1

Why there is a drawing of it??
[1]:

778×560 86.5 KB

init


        TextureRegion regionBackgroundTop = ArtState.getTexture(ArtState.texture_background_top);
        decalBackgroundTop = Decal.newDecal(regionBackgroundTop.getRegionWidth() * 0.07f, regionBackgroundTop.getRegionHeight() * 0.07f, regionBackgroundTop, false);
        decalBackgroundTop.setPosition(0.0f, 17.0f, -35.0f);
        decalBackgroundTop.setRotationX(-45.0f);

        TextureRegion regionBackgroundBottom = ArtState.getTexture(ArtState.texture_background_bottom);
        decalBackgroundBottom = Decal.newDecal(regionBackgroundBottom.getRegionWidth() * 0.5f, regionBackgroundBottom.getRegionHeight() * 0.5f, regionBackgroundBottom, false);
        decalBackgroundBottom.setPosition(0.0f, -17.0f, -18.0f);
        decalBackgroundBottom.setRotationX(-45.0f);

        TextureRegion regionBall = ArtState.getTexture(ArtState.texture_ball);
        decalBall = Decal.newDecal(regionBall.getRegionWidth() * 0.05f, regionBall.getRegionHeight() * 0.05f, regionBall, true);
        decalBall.setRotationX(-45.0f);
        decalBall.setBlending(GL20.GL_SRC_ALPHA, GL20.GL_ONE_MINUS_SRC_ALPHA);
        decalBall.setPosition(0,2,0);

        TextureRegion textureGround = ArtState.getTexture(ArtState.texture_ground);
        decalGround = Decal.newDecal(textureGround.getRegionWidth()*0.035f, textureGround.getRegionHeight() * 0.035f,textureGround,true);
        decalGround.setPosition(0,0.5f, 7.0f);
        decalGround.setRotationX(-90.0f);

Draw

decalBatch.add(decalBackgroundBottom);
        decalBatch.add(decalGround);
        decalBatch.add(decalBackgroundTop);
        decalBatch.add(decalBall);