Overlapping images

[jchesterisidoro]

Hi, my main goal is to remove the green background of an image(using chroma key) and then replace the background with a different image. Normally, I'll simply get the 2d context of a canvas and drawImage(background) and then drawImage(chromaKeyedImage) to attain this. However, I can't get the 2d context of the canvas anymore after using the chroma effect. I think it was because I already got the 'webgl' context. Is there a way to do this? I'm looking at the layers effect but you don't have any tutorial on how to do use it. I'm not even sure if I really need the layers effect to do this.

Thanks.