Why trees come out like this?

Hey,

I tried to render a 3D tree in Sketchup and I used the texture downloaded from Polligon with all the different sublayers, like the bump layer, gloss layer and I added the bitmap in the diffuse command and uploaded the image, it came out like this with leaves become pieces of leaves images. I am sure something is wrong with my settings, Anyone could help me in terms of settings?

Thank you so much!

It seems you need an opacity map to add..

Thanks! But the bitmap I loaded into V-ray is png, which is an opacity format, right?

Then, activate custom source-diffuse texture alpha option in opacity section..

Thank you so much! It works!