Creators test local MiniMax H3 in ComfyUI for 15-second motion renders

• Local H3 prompts gained control from shot order and literal physical rules: GlennHasABeard's weather test names four forecasts in sequence, while GlennHasABeard's yarn test assigns different directions to the two ends of one strand.
• Audio carried timing and motion cues in these tests, from the left-to-right popping front in GlennHasABeard's bubble clip to the lid turns counted by squeaks in GlennHasABeard's fog test.
• The reported local preset used ComfyUI, 864x480 at 24fps and 20 steps, according to GlennHasABeard's setup post; GlennHasABeard's render-time reply puts a generation at about 50 minutes on an RTX 3060.
• Constraint lines kept impossible materials on-script: GlennHasABeard's water test tells the model not to spill, and GlennHasABeard's desk test gives the ripple an inkwell that must react.
• Material metaphors supplied the motion vocabulary, with GlennHasABeard's ice-plane clip routing a shaving through a tool and GlennHasABeard's sand cut pairing an eight-second cut with an eight-second hiss.

MiniMax open-sourced H3 in August, and ComfyUI's official workflow guide describes open-weights text, image, and reference-to-video workflows with native stereo audio, up to roughly 15 seconds at 24fps. The fog jar turns its sound track into a counting device: three lid squeaks produce three screw-top rotations in GlennHasABeard's fog clip.

These are text-to-video runs. GlennHasABeard wrote in the local setup post that styled starting frames drifted from their look before a clip ended, so the showcased experiments avoid image-to-video.

The stated baseline was:

• ComfyUI with open H3 weights
• 864x480 resolution, 24fps, 20 steps
• no Turbo LoRA
• res_multistep sampler with the simple scheduler
• Topaz upscaling after generation

A 15-second run took about 50 minutes on the creator's RTX 3060, per GlennHasABeard's render-time reply. GlennHasABeard's Topaz reply identifies the local upscaler as Topaz Video's Proteus.

The bottleneck is moving too. ComfyUI's September 22 VAE update cut a 1344x768, 129-frame encode/decode round trip from 24.3 to 12.7 seconds, a VAE-only measurement rather than a full-generation time.

The prompts work like miniature production instructions: identify the action, state the order, then pin the camera. The weather prompt in GlennHasABeard's weather test specifies white cloud, grey rain, snow, then orange sunrise, preventing the four-panel frame from collapsing into repeated weather.

The audio layer gets similarly literal treatment:

• A domino sequence uses ten tinkles, one per second, to preserve the order after one tile becomes a splash of water in GlennHasABeard's domino test.
• A bubble-pop sound line moves left to right, matching the fireflies' release order in GlennHasABeard's bubble clip.
• The fog jar fills bottom-up like water, then three squeaks count its three cap turns in GlennHasABeard's fog clip and the matching fog test.

GlennHasABeard calls out a short negative constraint as a “consistency line,” used where the default material behavior would ruin the shot.

• The water disc has to “never spill” and leave the board dry in GlennHasABeard's sliced-water test.
• The sweater may only unravel while the scarf may only grow, with each end assigned a direction in GlennHasABeard's yarn test.
• Lake water behaves like heavy cloth, while a ten-second zipper click keeps the pull at a steady speed in GlennHasABeard's lake clip.
• A rippling envelope needs an inkwell that bobs as proof the desk is moving in GlennHasABeard's desk test.

The tabletop clips borrow familiar mechanics instead of asking for pure abstraction.

• The ice shaving travels through the hand plane's throat and curls over its top, addressing earlier takes that dropped it in front of the blade in GlennHasABeard's ice-plane clip.
• Golden light is written as thick liquid from a sponge, so it runs, pools, and finds a level on the counter in GlennHasABeard's sponge test.
• A cut through sand exposes a horizontal water band with tiny breaking waves; its eight-second visual cut is matched to an eight-second hiss in GlennHasABeard's sand-cut clip.

CharaspowerAI used the same material logic at title-sequence scale. The prompt starts with two ocean walls, runs the camera between and around their collision, then pulls the suspended water into the word “TIDAL” before a left-to-right pressure pulse detonates the letters.