Transparent object casting shadow

I have a glove that I have to make appear gradually on a hand. The glove is modelled from the hand geo with a slight push. My problem is when the glove geometry is transparent, it still cast some shadow (from vraylight plane) on the hand in some area. The transparency is from a black and with material in the opacity slot of a vray material.

Any idea wht this could be. I tried vraylight bias to zero, and max transprency level to 500 and there is still some shadow.

In refractive panel of material there should be shadow option u could tick… I think its affect shadows. Try that.

Thank you it could had been this but I found out the cause of my problem: in my glove I had double faces on some parts. the double faces were not really casting shadows, just creating some dark spots. I just erased them and everything is fine now.