Fabric & Material Module

The Fabrics module allows team accounts to manage PBR (Physically Based Rendering) fabrics used by the 3D customizer. Each fabric has:

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- A **preview thumbnail** (`image_url`)

- Up to **5 texture maps** stored as URL columns directly on the fabric row (`texture_alpha_url`, `texture_ao_url`, `texture_displacement_url`, `texture_gloss_url`, `texture_normal_url`)

- **PBR render settings** (repeat, normal scale, roughness, AO map intensity, metalness)

- Optional **category assignments** linking to the shared `categories` table