Hello, I try to make my own bushes and other flowers (roses, daisies …). I saw on internet need to crop the flower in question, then add an alpha channel.
If I stay here when I import my texture in unity, it does not work properly, the alpha is ignored …
I want to know how to make my texture to get pretty flowers in unity.
When you drag your texture onto your flower mesh, Unity will create a material for it and assign a Diffuse shader to the Material.
You need to change the shader to Transparent/Diffuse in order for it to pick up the alpha channel.
For things like grass and flowers you can also use the cuttout shaders.
Thanks 
perfect…