I made some tests using an example video on youtube ( https://www.youtube.com/watch?v=cqZuhJZAK-8&list=PLTH1W-kYjBQPMw0T2Oa9aNlWlPzAkYQmM&index=3 )…as you can see the video as an intro with green tonalities changing a bit and only when the tiger appear the green is perfectly uniform. Now i tried to chroma keying it with olive and with ue4…as expected with olive is far more easy and permissive…it’s able to catch also the green in the intro even if not perfectly…the tiger runs perfect. With ue4, no matter how much i try all the settings of the node, the intro it’s impossible to chroma keying enough but the tiger works well.
So ue4 requieres perfect illumination on green screen during recording and this not so easy to do at home!
I ask myself if the new chroma keying plugin on 4.26 works better…i’ll try this hoping not to change all the exposure and illumination of the project due to the exposure changing applied by epic games from 4.25.