hi friends. last day i was trying to render shadow pass using maya mental ray. i rendered all passes very nicely. i rendered diffuse, beauty,specular,camera depth passes. now the problem is with passes like diffuse and beauty my alpha channel is also supporting but with shadow pass alpha channel is not supporting. i have also given number channels 4 to include alpha but wen i composite it in after effects diffuse and beauty passes cms with alpha whereas in shadow pass alpha is igonred. :( i am tired searching on net but of no success so far.