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Generate a Procedural Set

Goal: Generate a fully AI-built environment — city block, building interior, or landscape — without uploading anything or using Blender.

Procedural sets are AI-generated 3D environments built on the fly from parameters you specify. Unlike the set library (which gives you pre-made environments) or image sets (which are flat photos), procedural sets give you a spatial environment you can move a camera through. They cost credits to generate but require no 3D skills.

If you know film production: think of this as ACT3 AI building a practical location from scratch — it generates something that fits your story rather than requiring you to find a real location that happens to match.

Steps​

  1. Open your scene. Click the scene in the project sidebar. The Scene panel opens.

  2. Click the Set slot. In the Scene panel, find the Set row and click Browse Sets.

  3. Click Generate Procedural Set. In the Set Browser, click the Generate Procedural Set button. A configuration panel opens with generation options.

  4. Choose the set type. Select one of the three procedural set types:

    • City on Rails — a city block or street environment with buildings, sidewalks, roads, and urban details
    • Building on Rails — an interior environment: a single room, hallway, floor, or multi-room layout
    • Natural Landscape — open terrain: forest, desert, beach, field, cliff, or similar outdoor locations

  5. Set the parameters for your chosen type. Parameters vary by type:

    • City on Rails: Building density (sparse / moderate / dense), Era (Contemporary / 1950s / 1980s / Futuristic), Architecture style (Industrial / Residential / Commercial / Mixed), Time of day, Weather
    • Building on Rails: Interior type (Office / Apartment / Hospital / Warehouse / Restaurant / Other), Room count, Floor material, Wall style, Lighting mood
    • Natural Landscape: Terrain type, Vegetation density, Weather, Time of day, Ground cover

    For example: Building on Rails → Office → 3 rooms → Hardwood floors → Modern → Bright overhead lighting.

  6. Click Generate. ACT3 AI submits the generation job. A credit cost estimate appears before you confirm — review it and click Confirm Generate. Generation typically takes 20–60 seconds.

  7. Preview the result. When generation completes, the preview pane shows the environment from a default camera angle. Use the preview controls to rotate and pan through the space.

  8. Regenerate if needed. If the result doesn't match what you had in mind, adjust the parameters and click Regenerate. Each regeneration costs credits. Small parameter changes can produce noticeably different results, so adjust one variable at a time to zero in on what you want.

  9. Assign the set to the scene. Click Assign to Scene. The set is saved to your project and attached to the current scene.

  10. Adjust parameters after generation. Assigned procedural sets can still be adjusted. Open the Set Editor from the Scene panel, change parameters, and click Regenerate to update the environment. All shots in the scene will re-render against the updated set.

Tips​

  • City on Rails is ideal for street scenes, chase sequences, establishing shots, and urban drama. It generates a stretch of city environment that a camera can move through.
  • Building on Rails handles offices, apartments, hospitals, and institutions — any interior where you need rooms and hallways rather than a single backdrop.
  • If you want a specific real-world location feel (e.g., a Tokyo side street or a 1970s Los Angeles apartment), use the Architecture style and Era parameters together and add descriptive text in the Custom Notes field.

Next steps​