Practice 01 : Keying

This is my first attempt in pulling a key of a greenscreen. I will continue to post my progression with following structures:

• Original greenscreen plate
• Key
• Final composite
• Node tree screenshot

If I have no specific background to composite over, I'll keep using a constant with a colour value of 0.18.
Here we go, my first attemt of pulling a key. Please wirte any comments on what could be done better and how you would achieve it.

 Greenscreen plate

 

Key:

Composite:

Node tree: