help~converting 2d to 3d

I am making a map into a jungle map, using alot of the foliage from bruchwood, but when I make the ground, for instance, I take the plant, and export it to Dedit and import in the ground file, but it just basically paints the foliage on the ground, instead of a 3-d of the thing actually stickin out of the ground.
Is this even possible, or is 3-d rendering objects something that has to be in the world's coding?

to get a 3d model added you'd need to add it to the model folder in .ltb format, also you'd need to alter the .ltb info of the floor file it sits on. The texture (the 2d image) of the plant needs to be skinned on the .ltb. And in the end, only you'd be able to see the plant and it would be an obstacle for you alone.