GlennHasABeard reports hour-long renders for local 15-second MiniMax H3 clips

• Local 15-second MiniMax H3 clips take about an hour on the RTX 3060 machine GlennHasABeard shared.
• His staging limits counting problems: objects start in frame in the three-key clip, while three mushrooms each get one timed action.
• The finished clips go through Topaz to 4K, according to his crystal-ball post.

MiniMax's official H3 release supports video up to 2K; GlennHasABeard's posted workflow uses 0.4-megapixel frames before upscaling. A teapot shadow turning into a cat took three generations to get right.

GlennHasABeard asked followers whether they run anything locally or work entirely in a browser. His own ComfyUI setup supplies a concrete baseline: about an hour for a 15-second clip.

His posted machine specifications are:

• GPU: Nvidia GeForce RTX 3060, 12 GB VRAM.
• CPU: Intel Core i7-8700K at 3.70 GHz.
• RAM: 32 GB.

MiniMax publishes the H3 weights and input specifications, including text-only generation and first/last-frame conditioning through its FL2VA checkpoint.

The prompt is “inside the clear glass a tiny storm is raining on a tiny house,” with the camera locked at table height. The clearing follows a single left-to-right cloth wipe.

Two clips give counting a deliberately small role:

1. Keys: “one slow breeze swings them so they ring against each other like a wind chime.” All three keys are present from the first frame, so the model never has to introduce them one by one.
2. Mushrooms: “open their caps, and glow softly.” The action proceeds left, middle, right, giving each mushroom its own position and moment.

A whole cat without a reference image drifted off-model, GlennHasABeard reported. The pumpkin is an elegant continuity cheat.

• One paw: “pushes one wrapped candy slowly across a table until it drops off the edge.” The pumpkin conceals the rest of the cat.
• Eyes and a tail tip: In another pumpkin clip, two yellow-green eyes open behind the carved eye holes, leaving little anatomy to maintain.
• A sheet: “A small white cloth with two eye holes slides across a wooden floor by itself.” The costume hides the cat entirely.

The prompt was “all you see is its boot prints pressing into the dirt.” Earlier takes left one print at a time facing away, “like a one-legged walker going backwards,” GlennHasABeard wrote.

The revised footprint sequence alternates left and right, with toes pointing toward the camera.

Early attempts at “the teapot's shadow slowly turns into the shadow of a sitting cat” placed a real cat in the room and cast its shadow onto the teapot. Getting the teapot's own shadow to transform took three generations, he said.

In a separate upscaling test, GlennHasABeard said freckles blurred at 480p regained their edges with Starlight Precise, his stated reason for rendering small and upscaling afterward.

Topaz's Precise documentation describes enhancement aimed at realistic skin and fine textures, with output up to 4K. It also lists footage below 480p as less suitable for the model.