its very useful when cheating with ambient oclusion 
basically a vray light, where you can apply a dirt shader and control the amount of AO (sort of)
in heavy distantexterior scenes, you can use it together with vray sun to create illusion of GI with drastic rendertime improvements compared to GI
it also doesnt flicker if you set it up well
))

basically a vray light, where you can apply a dirt shader and control the amount of AO (sort of)
in heavy distantexterior scenes, you can use it together with vray sun to create illusion of GI with drastic rendertime improvements compared to GI
it also doesnt flicker if you set it up well

Comment