Damage Creator

1. Requirements & Installation

Requires Blender 4.5 or newer. No external libraries or downloads are needed.

1. Download damage_creator-1.0.0.zip. Do not unzip it.
2. In Blender, go to Edit > Preferences > Get Extensions.
3. Click the arrow menu in the top right corner and choose Install from Disk.
4. Pick the .zip file. That's it.

You can also simply drag the .zip into the Blender window. To update, install the new .zip the same way. Your saved presets are kept.

2. Quick Start

1. Select a mesh object (a closed mesh works best).
2. Open the sidebar in the 3D Viewport with N and go to the Damage tab.
3. Click Erosion, Spalling, Corrosion or Fracture. The damage appears right away.
4. Adjust the sliders, or pick a look from Apply Preset.
5. Click New Variation until you like the pattern.

3. The Panel

Everything Damage Creator adds is a regular Geometry Nodes modifier: Surface Damage or Fracture. It updates live, can be reordered and stacks with your other modifiers.

The sidebar shows the most used settings. All settings (materials, quality, rebar, effect area and more) are in Properties > Modifiers.

An object can have several damage modifiers, for example Spalling and then Fracture. The eye icon next to each one turns it on and off in the viewport.

4. Surface Damage

Erosion, Spalling and Corrosion are three Types of the same modifier, so you can switch between them at any time. The damage is cut into the mesh: faces it doesn't reach keep their original topology.

Erosion wears stone down into soft, rounded shapes. Spalling breaks concrete away in shallow layers with jagged rims. Corrosion eats pits of two sizes into the surface, in patches.

5. Fracture

Splits the object into real pieces. Each iteration cuts every piece in two, so 4 iterations = 16 pieces (the sidebar shows the current count). The two sides of each cut come from the same surface, so the pieces fit together perfectly.

When you add a Fracture, a Weighted Normal modifier is added after it for clean shading. You can turn this off in the operator options.

6. Effect Area

Limits Surface Damage to part of the object. Click Effect Area and a box (an Empty) is added over the top of the object and selected, ready to move, rotate and scale. Damage only happens inside the box.

• The box is parented to the object, so it follows when you move the object.
• Area Falloff (in Properties > Modifiers) sets how soft the border is.
• Select the box to see which object it controls, and click the name to jump back to that object.
• Turn Use Area off to damage the whole object again.

7. Presets

Apply Preset works on all selected meshes. If the object doesn't have the right modifier yet, it is added. The object keeps its own variation (seed).

Click + to save the settings of the active damage as your own preset. They appear under My Presets. Click - to delete one. Your presets are stored outside the add-on, so they survive updates.

8. Working with Many Objects

• Every button works on all selected meshes. Select several objects and click Spalling to damage them all at once.
• New Variation gives each selected object a new random pattern.
• Copy to Selected gives the other selected meshes the same damage as the active object. In the operator options: Replace Existing (on by default) removes their old damage first, and Same Variation (off by default) makes identical copies instead of a new variation per object.
• Objects that share the same Effect Area box after copying are all limited by it.

9. Apply & Remove

Apply Damage makes the damage permanent, for export or further editing. It asks for confirmation first.

Remove Damage deletes the damage modifiers from the selected meshes and leaves the rest of the model untouched.

10. Tips & Troubleshooting