I am the same person who replied on Discord to this question, so this may be repetitive and I'll try to summarize. Roll20's FX probably can't do fists, because it is Particle effects (technical term that describes the kinds of art-effects it can create, usually organic-looking but not specific objects, it's good for creating things like smoke, shaft of light, fire, water, dust, blood). If you want to try it, here are the instructions for creating Custom FX in Roll20 (Look on the parts of this page that talk about "Custom FX"): <a href="https://help.roll20.net/hc/en-us/articles/360037258714-Effects-FX-Tool" rel="nofollow">https://help.roll20.net/hc/en-us/articles/360037258714-Effects-FX-Tool</a> With that said, I recommend using Animated GIF format instead for making things like flying fists punching outward, or a sword swinging in an arc. Those kinds of illustrative animation art are totally do-able as GIF's, and Roll20 supports uploading that format (although Roll20 will transcode it to a webm format when you upload it).