Just use a transparent shader on the game engine, that's the easiest way.
You can get a more detailed model version if you disable optimization before exporting.
Nice, thanks for your purchase
Unity with C#
Please, can you share a sample of the texture that you are trying to import?
Please make sure that the material is applied to the object that contains a mesh renderer.
Exported objects are models in .obj format
Drop the .obj file into unity, then the same texture and apply it to the material
Please, can you send me a sample of your sprite sheet?
:D Wow, thank you! :D