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My model must support transfer textures but I can't do this using mesh + modelBuilder.part

Opacity is tested correctly on only half of the model.

BlendingAttribute blendingAttribute = new BlendingAttribute();
        blendingAttribute.opacity = 1.0f;
        
        modelBuilder = new ModelBuilder();
        modelBuilder.begin(); 
        modelBuilder.part("minecraft:loading_model", mesh, 4, new Material(TextureAttribute.createDiffuse(atlas), blendingAttribute));
        modelInstance = new ModelInstance(modelBuilder.end());
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    \$\begingroup\$ It looks like you should show us the relevant code to reproduce this problem. \$\endgroup\$ – DMGregory♦ Jun 22 '20 at 20:44
  • \$\begingroup\$ Really .. sorry I went down \$\endgroup\$ – Yuu Jun 22 '20 at 21:42
  • \$\begingroup\$ Looks like you're using alpha blending, without disabling z writes. You more likely want to use alpha testing, so that you abort the transparent fragments before they write to the depth buffer and block the next quad from drawing there. \$\endgroup\$ – DMGregory♦ Jun 22 '20 at 21:45
  • \$\begingroup\$ Yes, the minecraft oak tree should be composed of two planes with transparent pixels \$\endgroup\$ – Yuu Jun 22 '20 at 21:49
  • \$\begingroup\$ I found the solution in a badlogic forum. modelInstance.materials.get(0).set(FloatAttribute.createAlphaTest(0.95f)); \$\endgroup\$ – Yuu Jun 23 '20 at 2:42
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I found the solution in a badlogic forum.

This:

modelBuilder.part("minecraft:loading_model", mesh, 4, new Material(TextureAttribute.createDiffuse(atlas), blendingAttribute, FloatAttribute.createAlphaTest(0.95f)));

Or this:

modelInstance.materials.get(0).set(FloatAttribute.createAlphaTest(0.95f));

enter image description here

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