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I am trying to make a portal to hell for an invasion. I have this portal that i turned the opacity down for for you to see, a placeholder image, and some stock footage. When I set one or the other to an alpha matte to the element portal, they are both hard edges, but as you can see, there are shadows that I want to make 3d looking for the portal. What do you recommend I do? Some reference if youre still confused, check out the avengers iron man nuke scene, the space portal is similar.
Also luma mattes sort of worked but had weird transparent but not parts