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[Max] I need help! / How to add alpha to EXR
« on: 2022-10-12, 16:48:50 »
I have few photo-light exr which have black border. It looks bad in reflections, so i figured out that i could make opacity map, so the border become invisible in render. I painted mask in Affinity Photo, saved the file as exr with alpha channel and loaded it in Corona light material. It kinda works, but the problem is, that as soon as i enable opacity, the exr in light material becomes much more contrasty and significantly brighter. If i save opacity map as separate 8bit file and load it into light material's opacity slot, then it works perfectly and doesn't affect contrast, nor brightness. The problem with this method is, that now i have 2 separate files and i don't like it for several reasons. Now the question - am i doing something wrong in how i author and save exr with alpha, or it's Corona that handles that alpha channel incorrectly?