AI Storytelling & Handcrafted Feel

Infuse algorithmic placements with asymmetry, focal gaps, and clustering bias

Procedural scattering algorithms often suffer from “perfect uniform distribution” syndrome. They distribute grass, rocks, and trees in perfectly even spacings that feel sterile and artificial. Real-world environments are asymmetrical, chaotic, and driven by narrative context—a campsite has gathered logs around a fire, rocks pile up in natural clusters, and pathways naturally form clear focal openings.

The AI Storytelling & Handcrafted Feel window allows you to apply narrative clutter presets and adjust placement statistics to replicate the organic brush strokes of human level designers.

Spatial Composition Principles

This system modifies candidate positions, scales, and densities using three naturalistic layout algorithms:

1. Clustering Bias (Natural Grouping)

In nature, flora and debris rarely grow in isolation; they cluster together where seeds fall or wind deposits them. The clustering algorithm selects random “attractor seeds” inside your placement bounds. Instead of a flat random distribution, candidate weights are amplified near attractors and dampened in-between, producing clustered groups separated by sparse clearings.

2. Focal Gaps (Negative Space)

A key rule of professional composition is the preservation of negative space. High-density noise blocks sightlines and creates visual exhaustion. The Focal Gap generator defines specific coordinates (or automatically identifies paths/camera sights) where scattering density is aggressively restricted to $0 - 5\%$. This guarantees clear sightlines toward landmarks, shrines, or doorways.

3. Asymmetry & Perturbation

Grid patterns are immediately broken using scale and rotation jitter. However, standard random numbers produce uniform ranges. The handcrafted engine applies Perlin-noise driven delta perturbations, generating smooth waves of scaling (e.g. smaller plants on the periphery, larger plants in the center) and directional leans that mimic prevailing winds.

Editor Window Interface

Access this system from the Unity menu: Tools → Decnet → Storytelling & Feel. The window features a premium dark header with a glowing gold accent.

  • Feel Presets: Select from pre-configured storytelling layouts:
    • Fallen Campsite: Generates dense clutter clusters with clear circular openings.
    • Overgrown ruins: Spawns high-density vines and debris climbing vertical surfaces while maintaining open floors.
    • Worn Pathway: Clears central corridors while banking heavy boulders and shrubs on the edges.
    • Prevailing Wind: Orients and bends all grass and tree models in a unified, naturally perturbed wave direction.
  • Clustering Strength: Slider to adjust how tightly grouped assets are. Higher values pull candidates closer to localized seed clusters.
  • Focal Gap Size: Configures the diameter of negative space zones, keeping critical scene viewpoints clear.
  • Perturbation Intensity: Controls the degree of non-uniform translation offsets applied to break up geometric grids.
[Uniform Procedural Scatter]          [AI Storytelling Scatter]
  *   *   *   *   *   *   *             * * *         *       * *
  *   *   *   *   *   *   *      vs     * * * *               * * *
  *   *   *   *   *   *   *                *        [Gap]       *
  *   *   *   *   *   *   *                                   *

[!TIP] Combine Clustering Bias with Mesh Surface Sampling when decorating ruins. By placing clutter seeds near broken pillars or wall corners, you can make moss and stone debris look like they crumbled naturally over time.

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