Spatial & Physics LoRA (MiniMax-H3)

Spatial reasoning and physical logic LoRA, trained on MiniMax-H3 (Comfy-Org/MiniMax-H3). It enables the base model to learn spatial relationships and physical motion of solid objects (collision, stacking, falling, occlusion, etc.)

This LoRA focuses strictly on object physics.

It is currently in the training and testing phase. The LoRA remains somewhat unstable due to issues with some training footage and labeling. A retraining run is planned for the next phase to fix these problems. The LoRA is usable at present; it moderately enhances physical feedback on top of the base model. The latest retrained version is wushu_spatial_physics_clean_3000_pruned.safetensors.

Video Comparisons

Tests using this LoRA show improved realism and physical logic across generated videos, such as realistic feedback from object collisions. It also works well for fight scenes to achieve realistic character collision effects.

Wushu fight clip with Spatial & Physics LoRA (strength 0.3)

Wushu fight clip without Spatial & Physics LoRA (identical prompt)

Other test videos (wushu_spatial_physics_v2_3000.safetensors)

Usage Instructions (ComfyUI)

Download the *.safetensors file and place it into ComfyUI/models/loras/

Load via LoraLoader, recommended strength: 0.8~1.0

Describe object motion using spatial and physical language in prompts

Keyword Library (extracted from training data)

① Subjects / Scenes

several colored objects

rigid objects

elastic objects

metal objects

a ball / balls

billiard balls

objects

on a table

in a synthetic scene

② Physical Behaviors

collision / colliding

a single collision between objects

bouncing / rebound

with visible impact and bounce

with minimal bounce

rolling into a wall

scattering

momentum transfer

in motion

③ Spatial Consistency Phrases (Critical!)

clear spatial layout

visible depth

consistent trajectories

gravity-consistent / gravity-consistent movement

gravity-consistent rebound trajectories

objects maintaining spatial relationships

realistic restitution

rigid collision with momentum transfer

Recommended Negative Prompt

Negative prompts were empty during training (no negative samples learned). It is recommended to only add quality/physical negative terms and avoid content conflicting with physical rules:

blurry, distorted, low quality, jittery motion, objects passing through each other, objects floating without gravity, morphing shapes, inconsistent lighting, flickering

Prompt Examples (ready to use)

Collision

several colored objects, a single collision between objects, metal objects with rigid, elastic collisions, clear spatial layout, visible depth, objects maintaining spatial relationships in a synthetic scene

several colored objects, objects colliding with visible impact and bounce, clear spatial layout, gravity-consistent trajectories

objects colliding with visible impact and bounce, clear spatial layout, gravity-consistent trajectories

Bounce / Rebound

Elastic objects bouncing with realistic restitution, clear spatial layout, gravity-consistent rebound trajectories

objects bouncing with realistic restitution, clear spatial layout, gravity-consistent rebound

a ball rolling into a wall and rebounding with minimal bounce, clear spatial layout, visible depth, rigid collision with momentum transfer

Multi-object Scattering / Billiards

billiard balls colliding and scattering on a table, momentum transfer between balls, clear spatial layout, visible depth

several balls on a table, a ball striking the group, momentum transfer, balls scattering with realistic collision, clear spatial layout, gravity-consistent

Trajectory / No Collision

Rigid objects in motion with clear spatial layout, consistent trajectories, gravity-consistent movement and visible depth

several colored objects, objects moving with consistent trajectories, no collision, clear spatial layout, visible depth, objects maintaining spatial relationships in a synthetic scene

Free Template (replace behavior keywords)

a ball thrown across the scene, [parabolic arc / gravity-consistent trajectory], clear spatial layout, visible depth

two balls colliding in mid-air, clear spatial layout, consistent trajectories, gravity-consistent rebound, visible depth