Mtl Wrapper Light Alpha

[ikerllamas]

Hello, I have a problem with lights in Vray.

 

I only use 3DS Max for easy things, but I have a problem in my composition of today.

 

I am creating a explosion to put it in a video, I have the explosion the alpha of the shadows but I can not render the alpha of the explosion light for then to put it in the ground of the video, maybe is not possible what I am trying to do.

 

I can see the green light in the shadow only but not around the object.

 

I have some images to explain it, the in the explosion video the ground is a road not a glossy ground like in the example.

 

Thanks.

Edited October 1, 2018 by ikerllamas