solved Exported file transparency issue.

[hulahula]

Hi guys ?

I have one question about exported .babylon file. Is it posibel chagne alpha(transparency)  of exported .babylon file? I want to make it slowly disepeat or sotmhig like that.

When i change the aplha to 0 nothing happens.

BABYLON.SceneLoader.ImportMesh("", "textures", "myObj.babylon", scene, function (newMeshes) {
  var myObj = newMeshes[0];
      myObj.alpha = 0; 
}

So I looked in the exported property whith console.log(myObj).

BABYLON.SceneLoader.ImportMesh("", "textures", "myObj.babylon", scene, function (newMeshes) {
  var myObj = newMeshes[0];
      console.log(myObj);
}

it shows me, that alpha is set NaN. And when I again change the alpha to 0 and looked in the property ... alpha was set  0 but again nothing happens.

Why is like that ?

Sorry for my bad english. ?

 

 

 

 

 

 

[jeke]

Hey,

I believe you want to change the alpha on the material for the mesh, not the mesh itself.

https://doc.babylonjs.com/babylon101/materials#transparent-color-example

So your code would look something like this:

BABYLON.SceneLoader.ImportMesh("", "textures", "myObj.babylon", scene, function (newMeshes) {
  var myObj = newMeshes[0];
      if(myObj.material)
      {
          myObj.material.alpha = 0; 
      }
});

 

[hulahula]

no it doesn't works?

ok it works now I forgot  use this code? :

var mySuperMaterial = new BABYLON.StandardMaterial("haha", scene);
myObj.material = mySuperMaterial;
myObj.material.alpha = 0;

[jeke]

That was going to be my next suggestion. Nice work!

[hulahula]

No I have other issue myObj is now white.

[jeke]

You could either use the inspector: https://doc.babylonjs.com/how_to/debug_layer or console.log(myObj.material) to look at what materials are coming in with your mesh without putting a new StandardMaterial onto them.

My guess is that they are coming in with materials and you just need to set the alpha on them.

If you could upload the myObj.babylon file I could take a look.

[hulahula]

so I found other solution : https://doc.babylonjs.com/resources/transparency_and_how_meshes_are_rendered

I used .visibility and  it works like the .alpha... for now... I leave this issue open yet, because I am not 100% sure.