Help with Luma Key

twhitworth Posts: 121 Just Starting Out*

Hey guys,

So I'm working on this project where two people are outside with a bright sky behind them that I will be replacing for another background.

"Perfect" , I thought. "I'll just luma key this out". But now I notice this horribly obvious white line around the actor that I cannot for the life of me figure out how to key properly.

I've tried numerous techniques, recently resulted to this elaborate mocha track, but I can't help thinking "there has to be a more common easier way to do this"

Does anyone know how to fix that white outline you get when keying this way? 

HitfilmPro 2017