# Ep.14 — Pose Mirror · Flip · Reset Selection

https://youtu.be/0wKVNBRbovs?si=ZpoWdyJUmLkTOJfR

## Overview

Covers cases where BipedPlus provides **better results than standard Biped** when doing **Copy · Flip (mirror)** in Ani Utils, and how to do **partial selection and reset**.  
Focuses on common confusing situations in **action poses** — **COM (Center of Mass)**, **Clavicle**, **Pelvis**, **Twist**, etc.

> **Where to do it:** **Ani Utils** tab → Copy / Flip / Reset Selection

---

## COM (Center of Mass) Tilt + Flip

### With Standard Biped

- Flipping while the body is **tilted** often results in **legs and feet pointing the wrong way**.
- This is especially true for **action/weight-shift poses** that use a **tilted COM**.

### BipedPlus

1. **Copy** → **Flip** (Ani Utils).
2. Even with a **tilted COM**, symmetry tends to come out **naturally**.
3. Useful for **left-right reversals of reference poses**.

---

## Clavicle-Only Mirror

### Problem

- Selecting only **Clavicle** for Copy · Mirror → **shoulder angle differs from intent**.

### BipedPlus

1. Select only **Clavicle** in the same pose.
2. Copy · Mirror.
3. Mirrors relative to **Chest (upper body)** → **shoulder line aligns**.
4. Same result when **Flip**-only Clavicle is selected.

**Use case:** When you only need to adjust **shoulders** without affecting the full body.

---

## Pelvis Rotation + Flip

### Behavior

- Quickly applying **multi-axis rotations** to **Pelvis** then Flipping can make **legs appear inverted**.

### How to Check

- If **Copy → Left/Right** makes the legs change **naturally** — it's a **correct mirror**.
- If it looks wrong:
  1. **Preview with Copy** before Flip.
  2. Adjust **Pelvis rotation order**.
  3. Or select **only legs/arms** and Mirror (see below).

> BipedPlus is designed to mirror **without forcibly separating the Pelvis** (explained in video).

---

## Body Twist · Partial Mirror

When doing a **full-body Mirror**:

| Body Part | Behavior |
|------|------|
| **Arms · Legs** | Left → Right **direct** symmetry |
| **Body tilt** | **Tilt preserved** |
| **Twist (single bone)** | Left × Right → **0** (twist **cancelled**) |

- **Body twist zeroed out** — to prevent **double twist** accumulation during full-body mirror.
- **To preserve Twist** → select **only arms/legs** then Copy · Mirror.

---

## Reset Selection — Upper Body Only Reset

**Keep lower body pose**, reset **only upper body** to default:

1. Select only **upper body**: Spine, Arm, Head, etc.
2. Ani Utils → **Reset Selection**.
3. **Only selected parts** return to T-Pose etc. — **leg pose stays**.

**Use case:** When fixing blocking/reference while **keeping lower body**, reset only upper body.

---

## Checklist

```
□ Tilted COM pose → Check Flip result
□ Clavicle-only Mirror → Shoulder symmetry?
□ Strong Pelvis rotation → Preview with Copy first
□ Don't want Twist=0 → Mirror arms/legs only
□ Reset upper body only → Reset Selection
□ Custom (twin tails) → Registered in Ep.13?
```

## Notes

- Unregistered (Ep.13) custom items may be **outside Flip·Reset scope**.
- May need to **re-key** after partial Mirror.

## Series Wrap-Up

Watching Ep.0–14 in order covers the **entire workflow**: **Build → Figure → Controller → Skin → Edit → Picker → Ani → Seed → Simulation → Mirror**.  
Apply alongside your team's **naming conventions, Layer rules, and export rules**.

→ [README — Table of Contents](README.md)