ChromaKey Loses Black Color

Development Rendering
1

Hello,

I have some issues during experimenting with the newest UE 4.21 with BlackMagic IO support.

In my project I’m receiving simple video signal with a person on the green screen and trying to use the build-in chroma key. So here are my questions:

  1. Why the keyer drops black color? What type of compression or something should I use to avoid effect like this:

8c26a13103a939ae040f0c133247c5c0.gif
8c26a13103a939ae040f0c133247c5c0.gif1162×1120 575 KB

  1. The next question is about receiving key (cut) and fill from ex. hardware extender. How to blend them in the correct way? Using masked and unlit material causes a bad blending with background (for example starter content’s ceramic tile).

Thanks!