Sometimes the one-button auto procedure just works, and it's magic. So what I typically do is first try Primatte (only available in the standalone version of Fusion Studio). Delta's pretty good and fast, but it has the same problem as Keylight-the spill suppression method makes crunchy brown noise. It had previously relied on the availability of Keylight, but The Foundry pulled the OFX version when BMD acquired Fu. I rolled my own keyer because for several years there wasn't a reasonable keying solution in Fusion. Maybe I'm doing something wrong, but do a lot of people really use Fusion for high-quality chroma keying or do they revert back to Premiere/After Effects when they need the best quality chroma key results? Getting smooth edges from Fusion really does feel like black magic. In fact, I can extract an image from a green screen and get smooth edges in just a few minutes in Premiere and the workflow is always intuitive and consistent, yielding consistent results every time. This often takes hours to experiment with various things until I finally have something relatively attractive, but it's still almost never as good as the results I get from Premiere. I understand Fusion offers endless flexibility, but I often have more than a dozen Fusion tools working in the Flow just to extract a clean image without jagged/jumpy edges.

I'm very close to achieving that goal, but the chroma key in Premiere seems to be so much easier to achieve high-quality results than the Delta Keyer and other chroma key tools in Fusion. I'm trying to eliminate my dependence on Premiere and After Effects. I love Fusion and Resolve and I've been using them for about a year now.

Primatte keyer after effects