BT-Material/Submesh Painter Pro: Advanced Material & Submesh Painting System

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Publisher

Barkin Tufan

Please Note

This entry is from Wednesday April 1, 2026. The price of the asset may have changed since then.
Please visit our homepage for recent offers and sales. Official and private Unity Asset Store™ sales usually last about 14 days.

Overview

Streamline Your Editor Workflow with Direct Material & Submesh Assignment


Skip the tedious back-and-forth between Unity and external 3D software (like Blender or Maya) just to assign a new material to a specific part of your model. BT-Material Painter Pro is a practical, performance-friendly editor tool that lets you paint selections on your meshes and automatically split them into proper submeshes right inside Unity.

Perfect for prototyping, hyper-casual development, or making quick material adjustments to existing props and characters without leaving the editor.


🎨 Core Painting & Mesh Systems


Spatial Hash Brush - Smooth Editor Performance

  • Responsive Interaction: Uses a custom spatial grid (MeshSpatialHash) to ensure smooth triangle selection without lagging the Editor, even on higher-poly meshes.
  • Dynamic Brush Control: Quickly resize your brush radius in the Scene View using Shift+Scroll.
  • Precision Mode: Drop the radius to zero for pixel-perfect, single-triangle selections.
  • Paint & Erase: Fluidly toggle between adding and removing triangles with the Shift key.

Smart Topology Selection - Quick Geometry Handling

  • Select Linked [L]: Isolate floating geometry islands (like glasses on a character or leaves on a tree) with a single keystroke.
  • Grow [G] & Shrink [H]: Expand or contract your active selection by edge rings.
  • Invert [I] & Clear [C]: Flip or clear your selections instantly for fast masking.
  • Submesh Isolation: Automatically extract and select triangles from a model's existing material groups.

Dynamic Submesh Builder - Real Geometry Separation

  • Physical Submeshes: This tool doesn't just paint vertex colors; it physically rebuilds your mesh into new submesh groups for true Material assignment.
  • Skinned Mesh Support: Safely processes animated characters (SkinnedMeshRenderer). It separates materials while keeping your bone weights and rigging data completely intact.
  • Draw Call Optimizer: The "Merge Same Materials" option automatically combines identical material slots into single submeshes, keeping your draw calls to a minimum.

Material Slot Manager - Rapid Prototyping

  • Pipeline Auto-Detection: Automatically creates materials perfectly configured for your active pipeline (Standard, URP, or HDRP).
  • 40 Quick Color Presets: Block out levels instantly with a built-in palette of ready-to-use color materials.
  • Slot Management: Lock specific slots to protect complex borders while painting, or hide them to see underneath.
  • Custom Materials: Easily drag and drop any of your existing Unity materials into the slots.

🚀 Editor Features & Workflow

Clean & Efficient UI

  • Modern, scalable UI Toolkit interface with real-time triangle count monitoring.
  • Scene view debugging with visual selection overlays (batches drawing to maintain Editor FPS).
  • Built-in 30-step Undo/Redo stack specifically for the painter to protect your workflow without breaking Unity's main history.
  • Quick Reassign button (↺) to instantly recall your last complex selection.

Safe Asset Management

  • Non-Destructive: Generates completely new .asset files. Your original imported models are never overwritten.
  • Automatic Saving: Routes and saves new materials and generated meshes directly to your designated project folders.
  • OBJ Exporter: Includes a built-in .obj and .mtl exporter if you need to take your newly separated meshes back to Blender/Maya.

📊 Practical Benefits

  • Saves Iteration Time: Fix missing material zones or colorize props in seconds.
  • Optimized Results: Built by developers who care about performance. Unused triangles can be pruned, and identical materials are merged automatically.
  • Scalable: Works reliably on everything from simple mobile props to complex desktop characters.

🛡️ Developer-Friendly & Transparent Built on the robust BT-MeshForge architecture:

  • Clean, non-intrusive namespaces (BT.MaterialPainter & BT.MeshExtractor) to prevent conflicts with your project.
  • Full C# source code included.
  • Detailed, straightforward documentation.

What You Get

  • Complete, well-commented C# source code.
  • PDF/Markdown Documentation.
  • Dedicated UI Toolkit Editor window & Scene View handler.
  • Built-in preset palette & exporter tools.
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