Hum ... I never used alphachanel in octane on 3ds max.
Alpha chanel i used set with scanline render i think is morer faster.

Sorry ! dude

Thanks dude !!! you solved my problem

My scene is at night, so i put a octane daylight and light like perfect !

but now i want put a hdri in eviroment just to make same reflections
But when i put hdri in enviroment slot nothing hapen .

Somebody can help me ! The dead line of my job is today