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---
title: "LOD Pipeline"
type: concept
tags: [game-dev, asset-pipeline, optimization, performance]
sources: [technical-artist]
last_updated: 2026-04-26
---
# LOD Pipeline
## Definition
LODLevel of Detail多细节层次管线是自动管理 3D 模型在不同观看距离下显示精度的系统。当物体远离摄像机时,自动切换到更低多边形数的模型版本,从而节省渲染成本。
## Core Concept
LOD 是**强制流程**——每个英雄网格必须经过 LOD 管线处理,最低要求 LOD0 至 LOD3。
## LOD Budget Standardfrom Technical Artist
### Characters角色
| LOD | 最大多边形数 | 纹理分辨率 | Draw Calls |
|-----|------------|-----------|-----------|
| LOD0 | 15,000 | 2048×2048 | 23 |
| LOD1 | 8,000 | 1024×1024 | 2 |
| LOD2 | 3,000 | 512×512 | 1 |
| LOD3 | 800 | 256×256 | 1 |
### Environment — Hero Props英雄道具
| LOD | 最大多边形数 | 纹理分辨率 |
|-----|------------|-----------|
| LOD0 | 4,000 | 1024×1024 |
| LOD1 | 1,500 | 512×512 |
| LOD2 | 400 | 256×256 |
### Small Props小道具
| LOD | 最大多边形数 |
|-----|------------|
| LOD0 | 500 |
| LOD1 | 200 |
## LOD Validation Script
```python
LOD_BUDGETS = {
"character": [15000, 8000, 3000, 800],
"hero_prop": [4000, 1500, 400],
"small_prop": [500, 200],
}
def validate_lod_chain(asset_name: str, asset_type: str, lod_poly_counts: list[int]) -> list[str]:
errors = []
budgets = LOD_BUDGETS.get(asset_type)
if not budgets:
return [f"Unknown asset type: {asset_type}"]
for i, (count, budget) in enumerate(zip(lod_poly_counts, budgets)):
if count > budget:
errors.append(f"{asset_name} LOD{i}: {count} tris exceeds budget of {budget}")
return errors
```
## Critical Rules
1. **LOD0 强制**:不得交付任何未通过 LOD 管线的资产
2. **切换距离验证**:飞行检查所有 LOD 级别的过渡距离,确保无明显 pop-in
3. **纹理一致性**:不同 LOD 级别应使用合理的纹理分辨率递减策略
4. **导入自动化**:引擎导入预设应覆盖所有资产类别,避免艺术家手动配置
## Related Concepts
- [[Performance-Budget]]LOD 是控制渲染性能的核心工具
- [[AssetPipeline]]LOD 是资产管线标准的关键组成部分
- [[VFX]]VFX 特效也有 LOD 概念(随距离简化粒子密度)
## Connections
- [[TechnicalArtist]] ← enforces ← LOD Pipeline
- [[AssetPipeline]] ← includes ← LOD Pipeline
- [[Performance-Budget]] ← achieved by ← LOD Pipeline