Is there a way to get backface lightinfluence on billboardgui's, or to make it seem like there is for volumetric lighting

so im trying to make volumetric lighting:


it uses billboardgui layers, but billboardgui’s backfaces dont get affected by light when lightinfluence is on, so is there a way to get backface lighting or something like it?

right now when looking at the light, the billboardguis closest to the camera and not behind the light dont get affected, but the ones behind the light do.

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better example of the issue, notice how it dissapears? thats because theres no backface lighting

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Can you tell me how you are arranging the billboard guis and how this setup works? Also, I think there is a setting called double sided in the GUI properties.