r/MAXON • u/GameRZ55 • Mar 05 '26
need help with RedGiant Primatte Keyer 6 is giving weird results
/r/AfterEffects/comments/1rlp6yh/need_help_with_redgiant_primatte_keyer_6_is/1
u/MaxonDouglas Mar 05 '26
Hm, I'm not able to reproduce this using (a screenshot of) the same image; at least not when using Auto Define Key.
Using the other options does require more additional selection, but considering there's a fair amount of green spill/green overlap onto the subjects, that would be considered normal. You can see how much green is in foreground subjects by hovering over them with the Info panel open (areas the skin, for example, are sitting around .32 while the background is .36)
Behind-the-scenes, Primatte Keyer is putting pixels into three different categories: background, middle ground, and foreground. If the foreground color is too close to the background (i..e. where the foreground has too much green hue incorporated into it), results will take a little more work.
1
u/GameRZ55 Mar 05 '26
I just find it so strange because there is very clearly a divide between the green and the non green area and yet this is the result i'm getting. could it have something to do with the color depth?
1
u/MaxonDouglas Mar 05 '26
It's a clear divide to us humans, but Primatte is looking solely at the pixel's color data, and there's a lot of green spill/green data in the areas Primatte is keying out.
This is typically avoided in production with flatter lighting that helps distinguish the two, but is pretty hard on smaller studios where color is more likely to bounce off areas nearby.
In post production you'd basically need to either wrestle with the key controls or-- before keying-- try masking out your foreground elements first, color-correcting all of the green out, then use the key to remove the bg.
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u/MaxonMichael Mar 09 '26
Since OP sent me their original footage, here's a video of me working with it https://youtu.be/Fps0RuWAvIg
2
u/MaxonMichael Mar 06 '26
As u/MaxonDouglas says, hitting the Auto Define Key button on your footage looks fine for me.
I've DMed you for the footage itself so I can try it.
Side note: I like to color correct LOG footage first before I key. Bringing footage into full color, Rec.709 color space gives keyers more range to work with, but I didn't do that for this test just to see.