change render engine

-- created by abhinav for max 2009 changing render engine from scaling to mental ray
rollout test "rendersystem"
(
dropdownlist dd "selectRenderer" items:#("Default_Scanline_Renderer","VUE_File_Renderer","mental_ray_renderer") height:6
on dd selected i do
renderers.current = RendererClass.classes[i]()
)
createDialog test width:180