Does anyone know how to use the alpha channels in Photoshop? I use After Effects for motion graphics and use alpha channels from time to time to create transparencies and gradient transparencies, and it works wonderfully in the app. For the life of me I cant figure out how to reproduce this in photoshop. I can use the alpha channel to create a selection which can then be used to crop out the piece of the image i need but this only works for objects that are completely opaque with hard edges. How do I use the alpha channels to catch gradients like highlights on glass or the effects of smoke or fog etc? I render images out of Maya which convieniently bakes the alpha channel into the image. Works great in AE but not so in Photoshop. HELP!