Sony Vegas default chroma key seem to shift blue colors After a few videos, I think that now I manage pretty well chroma key on a green screen.

But in my last video, my subject handles items that are light blue / cyan, and I started to notice that those items shift color and become an unnatural blue, it looks like contrast has been pushed A LOT after applying the chroma key effect, I never noticed that before (probably because this color is quite greenish).

But this is not how I thought chroma key was working. I thought it was just removing the parts of the video that was matching the selected color (+some margin) and not touch the other parts/colors of the video.

And indeed, testing it with several other tools (Adobe After Effects, Lightworks, and the NewBlueFX chroma key plugin), it does exactly what I expect : remove the background and doesn't touch the colors that doesn't match. Only the default chroma key plugin seem to do that.

Is it a bug in the chroma key plugin (that seem to exist at least on version 12 and 13) ? (but it would be surprising as I guess a lot of people would be affected)

Is it a bug with my installation ? (keeping in mind that uninstalling Vegas 12 and installing Vegas 13 didn't fix it)

Is it some parameter or something I forgot somewhere that would affect the chroma key plugin ?

Update :
Here is small parts of the video, with different effects applied :


The raw image
The best I can do with the NewBlueFX Chroma Key plugin
The best I can do with the default Vegas Chroma Key plugin (pretty ugly...)




Vegas Settings :


NewBlue Settings :
This might be an issue with the Vegas chroma key program removing green from all objects and making it transparent rather than finding only solid green and modifying that.

Someone may know how to fix this in Vegas, but if all else fails you can run your keyed footage through a program like Davinci Resolve Lite (free) and correct the colors.