I eventually discovered that this problem was arising due to the fact that I hadn’t selected for the alpha channels to be exported as well. I had trouble with this as when I rendered the clips their backgrounds seemed to turn grey rather than remaining transparent. Lastly, I exported the footage as individual clips with their original source names (to allow me to link them again at a later stage). After I was happy with the results I deleted the matte again. I had the most trouble with Knives’ (Lucy’s) shots as she has many fine, little wisps of hair around her face which were tricky to not disturb when keying out. Making the matte grey meant that I could spot any impurities easily against the neutral colour. I order to check the results of each key I did, I created a solid matte using the generator in effects and set it underneath the clips.
To neaten up, I adjusted the Matte Finesse settings, namely ‘clean black’ and ‘clean white’ so as to lose any noise or missed tones and ‘blur radius’ so as to blur the edges of the actor just enough to make them appear more natural when composited with a backplate. This tool allowed me to overrule the first key and keep the actors whole and prevent any tones in their skin from being removed.Īlso, Da Vinci has a magic ‘despill’ option which worked wonders on removing the green tones that were left behind on faces due to light reflection. I used the opposite qualifier in order to draw over the tones I wished to keep -this is the reason that Da Vinci was more efficient for keying my particular shots. Then, using the qualifier ‘3D’ setting, I drew lines to select all the colour I wished to key out in the green screen, making it transparent. Because I wanted to replace the green screen with transparency I then had to create an alpha channel and link my nodes to that.
Next, I took to Da Vinci Resolve to test whether that software would be any better for keying without reducing image quality of the actors… it was! Below you can see the process I went through in order to more successfully key.Īfter importing the clips and creating a timeline with them I selected each one separately and changed from ‘media’ to ‘colour’ mode.
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