![Every time I try to use the chroma key effect in Sony Vegas Pro 13. I end up with this box around the middle of the project. Please any help would be Every time I try to use the chroma key effect in Sony Vegas Pro 13. I end up with this box around the middle of the project. Please any help would be](http://i.gyazo.com/5ea9d4498a2672a21426924d8eae672e.png)
Every time I try to use the chroma key effect in Sony Vegas Pro 13. I end up with this box around the middle of the project. Please any help would be
![Alternate Green Screen Method in Sony Vegas -- When the Chroma Keyer Isn't Enough! --TUTORIAL - YouTube Alternate Green Screen Method in Sony Vegas -- When the Chroma Keyer Isn't Enough! --TUTORIAL - YouTube](https://i.ytimg.com/vi/f-pv2Z63BzQ/maxresdefault.jpg)
Alternate Green Screen Method in Sony Vegas -- When the Chroma Keyer Isn't Enough! --TUTORIAL - YouTube
![chromakey - Sony Vegas default chroma key seem to shift blue colors - Video Production Stack Exchange chromakey - Sony Vegas default chroma key seem to shift blue colors - Video Production Stack Exchange](https://i.stack.imgur.com/NYKkO.png)