Alpha channel bug in 15.2
Posted: Wed Nov 21, 2018 10:34 pmSpent a couple hours pulling my hair out until I found a solution to this, so thought I'd share.
I noticed after upgrading to Resolve 15.2 that any clips with alpha channels were no longer displaying correctly. Transparent areas are not completely transparent and the image becomes darker (like a steeper gamma). I tried about a dozen different formats for interchange, and Resolve had the same problem across the board. Just park an alpha clip above another clip and step a frame at a time. You'll see that when you step over the alpha clip, the composite image becomes darker like the transparent area has a low opacity black to it. Also the colors of your graphic will be off. This didn't happen in 15.1.
Anyway, the fix is simple (I wish I'd found it sooner). Just do *anything* to a color node for the graphic clip, and it'll snap back to proper display. I personally just added a point to the luma curve (shift+click near the curve and it'll make a point snapped to the curve so it doesn't effect the image). As soon as it forces this to be processed through the color page, the gamma bug is rerouted.
I assume 15.3 will fix this behavior, but this will get you by for now. Double-check ALL graphics with alphas, I found they were wrong without exception.
I noticed after upgrading to Resolve 15.2 that any clips with alpha channels were no longer displaying correctly. Transparent areas are not completely transparent and the image becomes darker (like a steeper gamma). I tried about a dozen different formats for interchange, and Resolve had the same problem across the board. Just park an alpha clip above another clip and step a frame at a time. You'll see that when you step over the alpha clip, the composite image becomes darker like the transparent area has a low opacity black to it. Also the colors of your graphic will be off. This didn't happen in 15.1.
Anyway, the fix is simple (I wish I'd found it sooner). Just do *anything* to a color node for the graphic clip, and it'll snap back to proper display. I personally just added a point to the luma curve (shift+click near the curve and it'll make a point snapped to the curve so it doesn't effect the image). As soon as it forces this to be processed through the color page, the gamma bug is rerouted.
I assume 15.3 will fix this behavior, but this will get you by for now. Double-check ALL graphics with alphas, I found they were wrong without exception.