Steamforge UE4 Freeform Building System – Concept Paper

Overview

This system introduces a traditional freeform construction framework into the Steamforge world using Unreal Engine 4. Unlike the modular voxel grid system, this approach enables players to construct buildings and functional structures directly within the open world, using physically simulated, snap-aligned components.

1. Core Concept

Players collect resources, craft structural components, and place them freely in the world. There is no need for a grid-based foundation—placement is validated through physics, collision, and alignment rules. The system supports immersive and flexible construction, ideal for survival, exploration, and sandbox gameplay.

2. Building Components

Basic Elements

• Wall Sections: Standard flat panels, available in variations (windowed, reinforced, decorative)
• Floor Panels: Horizontal supports; may require stable terrain or support pillars
• Roof Panels: Angled or flat, connect to walls or tops of floor pieces
• Doors & Gates: Interactive components with hinge logic and access control
• Pillars & Supports: Optional but useful for realism and stability

3. Placement Mechanics

Crafting Requirements

• Components must be crafted using resources and appropriate tools
• Optional: Require a workbench or construction kit to unlock advanced pieces

Placement Interface

• Ghost Preview Mesh: Follows camera or mouse until placement is confirmed
• Snapping & Rotation:
  • Snaps to adjacent structures or terrain
  • Rotation via keyboard input (e.g., 90° increments)
  • Free rotation toggle for custom angles
• Validation Checks:
  • Visual indicators (green for valid, red for invalid)
  • Must pass physics checks (no floating placements unless allowed)

4. Advanced Features

Snap Logic

• Edge and center snapping
• Vertical and horizontal alignment with magnetism
• Optional alignment override toggle

Structural Stability (Optional Subsystem)

• Structures can decay or collapse if not supported
• Weight and material strength may influence integrity
• Damage propagation (e.g., removing a central pillar collapses upper floors)

Persistence & Ownership

• Components persist in the world (unless destroyed)
• Ownership tags to prevent unauthorized edits in multiplayer
• Possible integration with base protection or PvP mechanics

Environmental Integration

• Buildings may offer:
  • Shelter from weather
  • Bonuses to crafting or sleeping
  • Defensive perks against wildlife or enemies
• Fire, flooding, or decay could be hazards

Blueprinting System

• Save assembled structures as reusable blueprints
• Ghost placement for blueprints shows required materials
• Auto-place as materials are added

Summary

The UE4 Freeform Building System complements Steamforge’s other construction modes by providing a tactile, immersive way to shape the world without reliance on voxel foundations. Ideal for outposts, fortresses, player housing, and emergent sandbox gameplay, it enhances both the survival and creative aspects of the game while remaining grounded in physical realism and player agency.