Cove Lighting in Mental Ray

Mga sir.. happy holidays.. i am new in interior rendering in mental ray.. and i am having some hard time kung papano ko palalabasin ung cove light sa mental ray.. i tried to model a t5 and then i used self illumination pero d maganda ung kinalabasan.. papano po ba ung tamang paraan to make a cove light.. more power to cg pinoy..

Try po kayong gumamit ng architectural material, apply n'yo sa desired object then adjust mu yung shininess at luminance niya.