Roblox has put two AI animation tools into Studio Beta, according to a November 5, 2026 post on the Roblox Developer Forum (DevForum) by Roblox staff member NeoShr3dder. Prompt to Animation turns a written description into a standard R15 animation clip, and Motion Rebuilder converts an existing R6 clip into a new R15 one.
Both work in Studio Assistant and through Studio MCP, the server that lets outside AI agents act inside Studio. In Assistant, creators turn on Animation Generation in Assistant under File > Beta Features, type /generate_animation, then pick New Animation or Upscale Animation.
Agents call a generate_animation tool instead, which can target a named rig, make clips of up to 10 seconds, or convert an R6 animation from its asset ID.
Roblox says one action takes about 20 to 30 seconds, and prompts that chain several moves can run past a minute. Ordinary human-like movement works best; swimming and some harder sport moves, such as a golf swing, still trip the model up.
R6 bodies are built from six parts with no elbow or knee joints, so Motion Rebuilder has an AI model work out how those joints should move, normally in under 10 seconds. Sliders blend original and generated motion separately for arms and legs, leaving the R6 original untouched.
“We’re not charging anything at this time,” NeoShr3dder wrote. Each account can start up to 4 generations per minute during the beta, with no daily cap, and converting a list of clips through MCP is rate limited. Roblox says limits may change before full release.
Why it matters: a solo developer, or an agent in Studio, can block out character motion without an animator, and older R6 games get a route to R15 without reanimating by hand. It also extends what agents can do over Studio MCP, which Roblox opened to its Open Cloud APIs on November 4.
Caveat: this is a beta, the timings and results are Roblox's own claims, and AIGamer hasn't tested either tool. Both support humanoid rigs only and output standard R15, not Advanced R15. Known problems include knees or elbows flexing the wrong way on some converted clips.
Roblox plans to add finger and face motion next, then broaden the range of moves the tools cover, beginning with gameplay actions. Support for playing generated clips on R6 rigs will come later.
