Disable shadow of Corona Light

hi there,

I am trying to do a studio setup, with one light on left of product, one light on right of product, and one light on top to get soft ground shadows, but 3 lights are casting 3 shadows, I just want shadows from top light, i don’t see any option to disable shadow casting of the light, i just want shadow from the top light, how can i do that ? vray has the option to disable casting of shadow in the light.

Please help.

Corona do no like fake scenarios, but you may try standard lights they can light without casting shadows