Modular building tool for Unity Editor. Instantly design multi-story buildings, dungeons or mazes with smart prefabs, auto room logic, and interior props – perfect for fast level design.
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This is a paid asset, but now you can download the “QUBIC – Modular Builder” for FREE. Please note that this package is provided solely for learning purposes or to test the product before purchase, and not for commercial use.
QUBIC – Modular Builder v1.3.3 (14 Feb 2026) (Latest version)
“If possible, please buy the package to support the developer”
Description
QUBIC is a fast and intuitive editor tool for constructing architectural designs in Unity using modular prefabs.
QUBIC lets you draw rooms like in a map editor, and builds the entire structure around them: walls, floors, doors, windows, stairs, props and furniture.
Just draw or move rooms in the scene view – everything updates instantly. Doors and passages are placed automatically, furniture spawns according to rules, and multi-story buildings stay connected by logic, not by hand.
No need to place each wall, align doorways, or manually decorate interiors – QUBIC handles the structure so you can focus on your ideas.
⚡ Fast & Interactive Building
Draw rooms and corridors directly in the scene
Instant live updates on any change (movement, resize, style)
Smart room logic automatically places doors, arches, rails, windows
🏗 Modular Construction
Grid-based snapping for accurate placement
Supports multi-floor structures, with logic across levels
Customizable room styles with easy switching
🪑 Interior Generation
Rule-based furniture spawning (curtains, beds, carpets, etc.)
Auto prop placement per room/floor
Support for bridges, balconies, atriums, rails, fences, rooftops
🧠 Smart Prefab System
One-click prefab setup using tag rules – no coding
Edit prefabs directly in-place and see instant updates
Style override for individual rooms or entire buildings
🧭 Advanced Tools
Debug view for placement rules and cell logic
Different door/connection strategies (e.g., labyrinth, tree, fully connected)
Isometric view support for easier 2.5D game layout
Designed For
Level designers working with modular kits
Game prototypes that need quick interior spaces
Dungeon/corridor design tools
Architectural previsualization
