To make a Roblox animation with AI, describe the motion in plain English and pick your rig type — an in-Studio plugin generates the KeyframeSequence, builds a playable Animation instance, and previews it on a dummy. No Animation Editor, no hand-keying joints.
The catch worth knowing up front: the rig type has to match your character, and animations need publishing before other players can see them. This guide covers the workflow, both gotchas, and where you'll still want to hand-tune.
How do AI-generated Roblox animations work?
When you ask an AI for an animation, it doesn't render anything — it produces structured data. It emits a description of keyframes that maps onto Roblox's animation primitives:
- Time (seconds since the start of the animation)
- Per-joint rotation and translation
- Per-joint easing style and direction (Linear, Quad, Cubic, etc.)
- Optional KeyframeMarkers for triggering sounds or effects
That gets turned into a real Roblox KeyframeSequence with a Pose hierarchy matching your rig's joint structure. The plugin registers the sequence with KeyframeSequenceProvider to get a playable clip URI, creates an Animation instance, and previews it on a freshly-spawned dummy in your workspace.
The upshot: you describe the motion in text and seconds later you have a working Animation instance you can Animator:LoadAnimation() against.
Step 1: Pick the right rig
Roblox supports two character rig types:
- R6 — 6 joints (Neck, Shoulders, Hips, RootJoint). Simpler. Classic blocky avatars.
- R15 — 15 joints (separate upper/lower limbs, individual wrists, ankles). More expressive. Most modern avatars.
R6 is easier to animate; R15 looks more natural. AI animation tools handle both, but you must declare which rig the animation targets. Generating for R15 and playing on an R6 character produces a broken result, because the joint names don't match.
Step 2: Write a motion prompt
The best animation prompts describe motion, not appearance. The AI only controls how joints move over time, so focus on:
- Body part movement. "left arm raises overhead, right arm stays at side"
- Timing. "over 0.8 seconds, then holds for 1 second"
- Style. "sharp and snappy" or "smooth and graceful" — these map to easing curve choices
Bad prompt:
jumping animation
Better prompt:
a one-second jump: torso compresses for 0.2s, then both legs push off and extend, arms swing forward to chest height, hold extended pose for 0.4s, then land with knees bending
The second produces something that actually looks like a jump, because every joint has a clear trajectory and timing.
Step 3: Generate, preview, refine
With Revix this is a single command with the motion prompt and rig type — see generate an animation. The plugin generates the KeyframeSequence, then spawns a dummy and plays the animation on it so you can see what you got.
Common refinement loops:
- Too jerky → ask for easing ("smooth easing, ease-in-out cubic")
- Too slow → reduce keyframe spacing or specify total duration
- Wrong body part moving → explicitly name which joints should and shouldn't move
Each iteration is quick, so treat it as a conversation rather than trying to nail it in one prompt.
Step 4: Use it in your game
Once you have an Animation instance, the player-side code is the same as any other Roblox animation:
local humanoid = character:WaitForChild("Humanoid")
local animator = humanoid:FindFirstChildOfClass("Animator")
or Instance.new("Animator", humanoid)
local track = animator:LoadAnimation(myAnimation)
track:Play()
To use an animation in your published game, you need to upload the KeyframeSequence as a real asset — locally-registered clip URIs won't resolve for other players. Open the KeyframeSequence in the Animation Editor and click Publish. Roblox returns an rbxassetid:// URI you swap into the Animation instance's AnimationId.
This trips people up constantly: the animation plays perfectly in Studio, then does nothing in the live game. If that's happening, it's this.
What is AI animation good for?
- Background NPC idles. A unique idle for every NPC, quickly.
- Emotes. Wave, dance, point, taunt — describe the motion, get it.
- First-pass prototypes. Rough in every animation so you can playtest the loop, then polish what needs it.
- One-off actions. Sword swings, victory poses, taking damage.
Where does AI animation fall short?
- Pitch-perfect combat. Frame-accurate hitboxes and snappy combat feel need hand-tuning.
- Synchronized multi-character animation. Two-character cinematic moments are very hard to get right via prompts.
- Facial expressions. Roblox face animation goes through a separate system (FaceControls) that text prompts don't cover well.
For these, generate a rough pass with AI and clean it up in the Animation Editor.
Common pitfalls
Wrong rig type. If your character contorts when the animation plays, you almost certainly generated an R15 animation and loaded it on an R6 rig (or vice versa).
Animation Priority not set. Idle animations should be Idle priority; action animations should be Action. Without this, your jump can get blended with the walk cycle and look strange.
Looping not set. Set KeyframeSequence.Loop = true (or ask for a looping animation) for anything that should repeat.
Frequently asked questions
Can AI replace the Roblox Animation Editor?
For volume work — idles, emotes, rough passes — largely yes. For anything where feel is the whole point, like combat timing, the realistic workflow is generating a first pass with AI and refining it in the Editor. The Editor stays useful; you just spend far less time in it.
Why does my animation work in Studio but not in the published game?
The animation isn't uploaded as an asset. Locally-registered clip URIs resolve in your Studio session only. Publish the KeyframeSequence from the Animation Editor and use the returned rbxassetid:// in your Animation instance.
Should I use R6 or R15 for AI animations?
R15 if your game uses modern avatars — more joints, more natural motion. R6 if you want a classic look or simpler animations. What matters most is that the animation's rig type matches the character you're playing it on.
Can AI animate custom rigs and props, not just characters?
Text-driven animation is built around humanoid joint structures, so standard R6/R15 characters are where it's most reliable. Custom rigs vary far more, and results depend heavily on how your joints are named and structured. For simple prop motion — a chest lid, a swinging door — TweenService in a script is often simpler than a KeyframeSequence.
Pairing animations with the rest of your game
Animations are most useful paired with logic that triggers them. Combine this with:
- How to Generate Lua Scripts With AI for Roblox Studio — wire animations to events
- How to Generate 3D Models for Roblox Studio With AI — animate custom props, not just characters
- How to Build a Roblox Game With AI — the full workflow
Install Revix and generate your first animation in the time it would take to open the Animation Editor manually.