Vray Render Output Has blue outline.

[rastamannichk]

I don't know if I post right topic to this section, but I really need help.

I have this render that I save in png file so that I can put sky background, the problem is the trees has an outline that is color blue, I am assuming that it is the reflection of sky. My trees are from laubwerk. Should I adjust in vray settings or what should I do to remove this outline.

I attached the image here. I put it in photoshop with black background so you can see the outline.

Thank for the help and suggestion.

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