Multi-Mat Baker - Bake Multiple Materials into One PBR Texture Set in One Click

Downloaded a character with 30 materials? Bought an asset pack where every piece has its own shader? Trying to export a complex prop to Unity or Unreal but your draw calls are out of control?

Multi-Mat Baker solves this in a single click.
Select your objects, press Generate, and the addon automatically handles every step of the pipeline UV creation, island packing, PBR baking, and material consolidation delivering a clean, single Principled BSDF material with a full baked texture set, ready to drop into any game engine.

What It Does
Multi-Mat Baker automates the entire multi-material → single texture workflow:

Fixes UV channel names across all selected objects for correct baking
Creates a dedicated BakeUV channel and packs all islands into one shared 0–1 UV space
Bakes all 6 PBR maps — Diffuse, Normal, Roughness, Metallic, Height, and AO
Builds the final material — one clean Principled BSDF with all textures wired correctly
Removes all old materials and assigns the new consolidated one
🗺️ Full PBR Texture Set — All 6 Maps
Map Output
Diffuse / Base Color Raw albedo, no lighting — correct for game engines
Normal Tangent-space, baked as 32-bit float — standard for Unity & Unreal
Roughness Native Cycles bake type
Metallic Emission trick — no native Blender type, handled automatically
Height / Displacement Emission trick — handled automatically
Ambient Occlusion Baked and available for manual blending

🎛️ Full Control When You Need It
The addon works in one click with smart defaults or gives you step-by-step control:

Resolution: 512 / 1024 / 2048 / 4096 / 8192px
Custom texture prefix — e.g. Hero → Hero_Diffuse_2048, Hero_Normal_2048
UV island margin control — prevent texture bleeding between islands
Bake pixel margin — set per-resolution (16 for 2K, 32 for 4K, 64 for 8K)
Cycles sample override — low samples for previews, high for finals
Auto-save to folder — all maps saved as PNG automatically
Missing map detection — smart dialog warns you before wasting bake time
📊 Real-Time Progress Tracking
Blender's bake is blocking — so Multi-Mat Baker shows live progress between every map:

Status bar at the bottom of the Blender window
Viewport header showing the current map and step count (e.g. MMB [3/6] — Baking Roughness…)
🎮 Built for Game Developers and Asset Creators
Perfect for:

Game developers bringing Blender models into Unity, Unreal Engine, or Godot
Asset store creators consolidating complex multi-material props
Archviz artists optimizing models for real-time engines
Anyone working with downloaded or purchased 3D assets with messy material setups
✅ Compatibility

Blender 3.0 → 4.x (including 4.2+ Extensions system via blender_manifest.toml)
Cycles render engine (auto-switches if needed — restores your settings after)
Principled BSDF based materials
What You Get

multi_mat_baker.zip — install directly via Blender Preferences
README with full documentation
Free updates for the current major version