Chroma key can be used to change the color of an image in photos. This is done by using a photo editing program to isolate certain colors from an image and then use these colors as the key to change the color of all other pixels in the image.
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To play Chrom Smash Ultimate, you’ll need the game and an internet connection.
Once you have both of those things, open up the game and press the button that says “Internet” on it. This will take you to a screen where you can enter in your desired server. After doing that, select the “Chrom” character and begin playing!