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Object Stamper is a MonoBehaviour stamper tool for procedural placement of objects inside a defined area. You position and scale the stamper in the scene, then MegaWorld evaluates each active Group and fills the area with prototypes that pass your filters.
New to Object Stamper? Follow the step-by-step Object Stamper — Getting Started tutorial first.

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Supported resource types

Object Stamper supports:
For grass and mesh detail spawning, use Grass Stamper. For terrain texture passes, use Texture Stamper.

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How it works

When you click Spawn, Object Stamper processes each active Group in order:
  1. Casts a ray downward from the stamper’s position to find the surface.
  2. Builds the box area from the result.
  3. Runs the full object spawn pipeline for that area.

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Spawn pipeline for each group

  1. Generates a random seed if needed.
  2. Runs the scatter system over the box area to produce sample positions.
  3. For each sample, casts a ray downward to find the surface hit point.
  4. Selects a random prototype weighted by Success Settings.
  5. Evaluates filter fitness (Mask Filter or Simple Filter) at the hit point.
  6. Discards the sample with probability 1 − fitness. Samples with fitness = 0 are always skipped.
  7. Calls the shared spawn routine which applies Transform Components and Overlap Check Settings.

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Shared systems

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Per-group settings

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Per-prototype settings

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Tool-level components

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Auto Respawn behavior

When Auto Respawn is on in the Stamper Tool Controller, changing any Group or prototype setting triggers a full respawn of that Group after the configured delay.

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When to use Object Stamper

Object Stamper is best when you want:
  • a one-shot generation pass over a large area;
  • a forest, rock field, or prop layout based on filters and scatter rules;
  • a workflow where the result is tied to a scene object rather than painted manually.

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Notes

  • Object Stamper does not support Unity/Terrain Detail. Use Grass Stamper for grass and detail density passes.
  • Object Stamper does not support Unity/Terrain Texture. Use Texture Stamper for terrain texture passes.
  • For the scatter system, a random seed is generated before each pass when Random Seed is set to auto-generate.
  • Types (Groups) configured in Object Stamper are reusable assets. The same Group can be added to Object Brush and used for manual painting with the same filter and scatter rules.