Pretty strange effect when viewing in Premiere and Media Encoder. (File is Prores4444 w premultiplied alpha) In premiere if I change the renderer to software ths goes away. GPU is AMD Radeon Pro Vega II 32 GB. THere is a mac Afterburner card installed. So far I see no reason to believe anything is wrong with the files. If I remove the Afterburner card all returns to normal. Also ProRes4444 with straight alpha looks normal.