I have created a low polygon trees in 3dsmax and now exported it to Med..
and i can still see those Black background in my tree leaves..
can anyone tell me how do i use alpha channel in this?

is your models skin a tga with alpha channel?

Nope Its a bitmap.. But i can convert the skin into Tga if you can help me use the alpha channel

I've encounter this problem before. The graphic guy give me a tree with alpha channel in .dds format, though you could see the alpha channel (black portion) when you import it MED.. but it's not a problem...

But when use the tree (with alpha channel). Add the tree model in WED, just follow this step:
1. add the tree model
2. check the overlay flag property of the tree model
3. build & run WED. You couldn't see the alpha channel anymore of your tree model

Cheers.

Thank you Man!! You have Helped Me a Lot..!!

No problem. Cheers.