Q: Assigning a material with alpha mask

Hi guys,
I downloaded a tree that has some materials (but they don’t show up) so I added the image to the color texture and “use alpha” is on by default, but the leaves has a solid black background. Is it possible to quickly add just one material with alpha and get a good result? Or does Rhino need a separate transparency map?
And if so then why does the leaves have a black background and not the gray color that the material has?
(If I change it to red then it still shows up as a green leaf on a black background, so to me it seems like “use alpha” has a bug of some sort.

Hi Jorgen - it works here in my made up material with a tiff image+alpha.
Are your textures png maybe? I’ll try that…

png worked as well…