Overview

Mat‑Assign is a Blender add‑on designed for quick, seamless material copy/paste. It ensures context‑safe rendering updates, preventing crashes and workflow interruptions.

What It Includes

• Copy/Paste materials under the mouse or via UI buttons

• Safe viewport refresh (redraw_all_view3d)

• Safe dependency graph updates (safe_depsgraph_update)

• Automatic material creation with preserved colors

• Clipboard system for held materials

• Hotkey listener with customizable modifier keys

• Viewport ↔ Shader color sync tools

Installation

1. Download the .py file.

2. In Blender, go to Edit → Preferences → Add‑ons → Install.

3. Select the file and enable Mat‑Assign in the add‑ons list.

Where to Find It

• Located in View3D → Sidebar → Mat‑Assign panel.

• Hotkeys available when enabled:

   Modifier + LMB → Copy material

   Modifier + RMB → Paste material

Recommended Workflow

• Enable hotkeys for fast copy/paste during modeling.

• Use the clipboard panel to manage held materials.

• Sync viewport and shader colors for consistent rendering.

• Apply materials across multiple selected objects with the UI paste operator.

Safety Notes

• Copy operations are read‑only (no undo needed).

• Paste operations support undo for safe experimentation.

• Context guards prevent NoneType errors and undo crashes.

• Background listener auto‑restarts safely when projects load.

Compatibility

• Blender 4.2+

• Works with Mesh objects

• Supports Principled BSDF shader nodes for color sync

Author

• Developed by Hisoka852  

• Version: 0.9.8  

• Category: Material Tools