Material Rendering Bible v1

Status: Accepted for Sprint 1.1

Scope: every material used by Streetline Heroes sprites, enemies, bosses, UI, tiles, props, backgrounds, and VFX.

This bible translates the [Pixel Art Standard v1.0](PixelArtStandard.md) into material-specific rendering rules. Every material page uses the same review structure so art direction, generation prompts, QA, and future validators can compare assets consistently.

Shared Material Rules

| Rule | Studio standard |

| --- | --- |

| Light source | Lighting Model 01: warm upper-right key, cool left rim, cool lower-left shadows. |

| Outlines | Material-dependent, selective, never pure black. |

| Clusters | Intentional shapes only; no random pixels. |

| Dithering | Controlled and material-specific; never noise. |

| 50% test | Material must remain identifiable at 50% scale by value pattern, cluster shape, hue family, or motion behavior. |

Material Index

1. [Steel](materials/steel.md)

2. [Brushed Steel](materials/brushed-steel.md)

3. [Gunmetal](materials/gunmetal.md)

4. [Chrome](materials/chrome.md)

5. [Bronze](materials/bronze.md)

6. [Gold](materials/gold.md)

7. [Copper](materials/copper.md)

8. [Leather](materials/leather.md)

9. [Fabric](materials/fabric.md)

10. [Denim](materials/denim.md)

11. [Carbon Fiber](materials/carbon-fiber.md)

12. [Rubber](materials/rubber.md)

13. [Stone](materials/stone.md)

14. [Concrete](materials/concrete.md)

15. [Brick](materials/brick.md)

16. [Glass](materials/glass.md)

17. [Water](materials/water.md)

18. [Electricity](materials/electricity.md)

19. [Energy Glow](materials/energy-glow.md)

20. [Smoke](materials/smoke.md)

21. [Dust](materials/dust.md)

22. [Fire](materials/fire.md)

23. [Ice](materials/ice.md)

24. [Skin](materials/skin.md)

25. [Hair](materials/hair.md)

26. [Cape Fabric](materials/cape-fabric.md)

27. [Wood](materials/wood.md)

28. [Painted Metal](materials/painted-metal.md)

QA Integration

Every material-specific QA checklist must be completed before an asset can move from generated to qa_passed in assets/registry/ASSET_REGISTRY.v2.yaml.

material page -> asset brief -> generated asset -> QA checklist -> registry lifecycle update