how to make texture transparent

I’m trying to apply a texture of leaf which is in RGB format. the area outside of the actual leaf shape in the texture is black(0, 0, 0). Does anyone how to make those black area be renderd transparent?
Thanks in advance.

This is typically done using an alpha cutout shader. You need a texture of a format that has an alpha channel, i.e. png.

PS: Why is this question community wiki?

What I usually do is use photoshop to make the background of my texture transparent then use the cutout or diffuse transparent shader. It has worked for me.

just use shader with double sided and cutout (Alpha Cutout)