I think it’s being save as a image file instead of a ’ transparent ’ jpg image file, so therefore, the complete plane is filled in. I having trouble finding sites to load transparent images. I am hoping someone can help with the fix. Thanks.
But there is no alpha in jpg could you try with a png ?
also to be sure to use alpha from your diffuse texture you need
material.diffuseTexture.hasAlpha = true;
material.useAlphaFromDiffuseTexture = true;Thank’s a lot that worked perfectly. For others interested, I used 
link
https://www.babylonjs-playground.com/#9WUJN#913
created transparent image with:
uploaded png file to: