Cloth Sim
Garment blockout → sim → art-direct → bake. Stable pins. Engine-friendly caches/shape keys.
When to Use
- Dresses, capes, coats, flags, banners
- Character clothing that needs drape
- Baking sim to shape keys or Alembic/USD caches
- Pre-roll settling before animation export
Workflow
Garment mesh (quad-friendly) → Vertex groups (pin/collide)
→ Cloth modifier settings → Collision objects
→ Pre-roll settle → Sim pass → Art-direct fixes
→ Bake shape keys / cache → Cleanup → Export
Mesh Prep
- Quads preferred; even density on deforming areas
- Avoid long skinny triangles on folds
- Apply scale before sim
- Separate garment from body collider
Vertex Groups
| Group |
Purpose |
PIN_Cloth |
Anchors (waist, shoulders, collar) |
COL_Ignore |
Optional non-colliding regions |
STIFF_High |
Belts, seams that should resist stretch |
Settings Starters
| Look |
Quality |
Speed |
Bending |
| Soft dress |
8–12 |
1.0 |
Low |
| Stiff coat |
5–8 |
1.0 |
Higher |
| Flag/cape |
8–10 |
1.0–1.5 |
Low–mid |
Tune mass and air viscosity for scale. Always run a settle pre-roll.
Bake Targets
| Target |
Use |
| Shape keys |
Game poses / few frames |
| Alembic/USD |
Cinematic caches |
| Armature weights |
If converting to deform-only |
Constraints
MUST DO
- Apply scale; define pin groups before long sims
- Collide against simplified body capsule/mesh
- Art-direct after sim (sculpt/corrective keys)
MUST NOT DO
- Sim hero cloth on ultra-dense sculpt meshes
- Skip pre-roll (starts mid-air / exploding)
- Export raw unstable caches
Reference Guide
| Topic |
Reference |
Load When |
| Cloth Settings Presets |
references/cloth-settings-presets.md |
When needed |
| Pin And Collide |
references/pin-and-collide.md |
When needed |
| Bake Targets |
references/bake-targets.md |
When needed |
