Which color input corresponds to the foreground in a Merge node?

• A. Green input
• B. Yellow input
• C. Blue input
• D. Red input

Answer: (A)

In Fusion’s Merge node, the two main image inputs are color-coded to show their roles. The image you want to appear on top—the foreground—goes into the yellow input. The image you’re compositing over—the background—goes into the green input. The blue input is typically used for a mask that controls where the foreground shows through. So, with a normal blend, plugging the foreground image into the yellow input and the background image into the green input will place the foreground on top of the background.