Runtime World Generation

Unity Version

• Unity 6 or newer required

Render Pipeline Support

• Universal Render Pipeline (URP)

• High Definition Render Pipeline (HDRP)

Core World Generation

• Runtime procedural world generation and automatic Region-based streaming

• World generation follows the player, camera, or any custom World Follow Transform

• World can start from any position with no predefined origin required

• Configurable Areas, Regions, Biomes, mountains, hills, World Noise, and terrain heights

• Spawn Matrix for controlling large-scale Area distribution

• Procedural dual-layer ground material system with height, slope, and noise-based blending

• Runtime Water System for both URP and HDRP

• Configurable terrain render distance and foliage/object spawn distance

• Instant Generation OnStart And Load option for completing the initial world build immediately instead of progressively streaming it over multiple frames

Vegetation and Object Spawning

• Indirect GPU-instanced vegetation rendering for dense environments

• Grass, Tree, and Other Object Pack systems

• Biome-based spawning

• Configurable density, grouping, randomized gaps, scale, rotation, terrain alignment, slope limits, height limits, and object spacing

• Supports custom trees, grass, rocks, bushes, buildings, props, animals, resources, and gameplay objects

• Dedicated editor tools automatically create the required materials, prefabs, and spawn data where applicable

• Optional Tree Mesh Generator included

Grass is rendered directly using indirect GPU instancing, while trees and other objects can use prefabs and optional colliders.

Ground Material System

• Custom procedural ground material system with a dedicated editor setup panel

• Uses two independent texture layers, with each layer containing a diffuse Texture2DArray and a corresponding normal-map Texture2DArray

• In the material editor, simply assign the ground textures, their normal maps, and the height at which each texture should begin appearing

• The editor automatically generates the required texture arrays, configures them, and assigns them to the material

• Textures within each layer are ordered by height and blended smoothly using a configurable transition value

• A second texture layer follows the same height-based setup and is blended with the first layer using procedural noise, helping break up repetitive or overly uniform terrain transitions

• A separate slope texture and corresponding normal map can be assigned for steep terrain surfaces

• Transition values and other ground-material parameters can be adjusted directly from the included editor panel

• The ground material responds to the Weather System, including snow coverage and wetness effects from rain

Weather, Sky and Time

• Clear, Rain, and Snow weather states

• Rain and snow particle effects

• Snow and wetness effects on compatible terrain, foliage, trees, and objects

• Indoor Layer support for preventing weather particles from entering interiors

• Manual weather control through the runtime API

URP additionally supports the full Timing System, seasons, automatic time-based weather progression, Sky Shader, clouds, sun and moon movement, day/night cycle, and Time UI.

HDRP supports manually triggered weather and surface effects, but weather does not currently control the HDRP sky, clouds, sun, or scene lighting.

Multiplayer Integration

• Optional multiplayer world-synchronization workflow

• Synchronization support for generated Regions, spawned objects, world time, runtime removal operations, new world generation, and late-joining clients

• Tested with Unity Netcode for GameObjects using Host-Client and Server-Client configurations

• Server, Host, Client, and Single Player world states supported

Runtime World Generation provides the world synchronization workflow rather than a complete networking framework. NetworkManager, transport, connection flow, lobby, matchmaking, authentication, hosting, and other networking systems must be configured separately by the developer.

Save / Load

• Deterministic world regeneration

• Multiple named saves

• Runtime Save, Load, and New Save functions

• Terrain and vegetation regenerate consistently after loading

• Runtime foliage removal is persisted through saves

• Clear Old Saves option included

Road System

• Roads connect different biomes.

• No dead ends — every road connects to another road.

• Bridges are automatically generated when roads cross water or very steep terrain.

• This is currently a beta feature, so minor visual glitches may occasionally occur.

Runtime API and Events

• World start and after-start events

• Functions that find and return terrain of a desired size at a desired height and slope

• Time, season, Area, and weather change events

• Region spawn, activation, deactivation, removal, and spawn-complete events

• Runtime terrain position sampling

• Runtime terrain normal sampling

• Combined terrain position and normal sampling with RegionSurface

• Runtime foliage removal API

• BuildWorldInstant() for immediately generating missing Regions around the camera

• Manual Clear, Rain, and Snow functions

• Current weather, temperature, world time, and date access

• Path finding between two points on the generated terrain, similar to a NavMesh path; it may not be as fast or as good as dedicated navigation solutions

All helper functions and events are explained in detail in the documentation.

Anti-Aliasing Recommendation

• For foliage-heavy scenes, FXAA is recommended when TAA produces visible ghosting or smearing during camera movement

• FXAA can provide a cleaner and more stable appearance for grass and fine vegetation affected by temporal artifacts

Performance

• Recommended World Quality: Medium

• Runtime world streaming designed for continuous gameplay movement

• Standalone build tested at over 100 FPS on a GTX 1660 Ti in a world similar to the asset screenshots

• Unity Editor Play Mode may introduce additional stuttering or overhead

• Depending on project and hardware, standalone builds can run up to approximately 3× faster than Editor Play Mode

• Actual performance depends on resolution, render pipeline, World Quality, render distances, vegetation density, object count, and hardware

Included Example Content

• 5 Rocks

• 20 Trees

• 8 Grasses

• 5 Flowers

• 6 Bushes

• 3 Dead Leaves

• 9 Ground textures and normal maps

• 5 Road textures and normal maps

• Rain and wind sounds

The included models are example content and can be replaced with your own assets. Runtime World Generation is a world-generation framework rather than a 3D model pack.

Requirements

• Unity 6 or newer

• URP or HDRP

• VFX Graph required

• TextMesh Pro (TMP Essentials) required for the included demo scenes and Time UI

• HDRP Motion Vectors must be disabled for indirect GPU instancing

• Mobile platforms are not officially supported

Included Documentation

Quick Start, World Setup, ground materials, Areas, Regions, Biomes, Spawn Matrix, vegetation/object setup, Tree Mesh Generator, Weather/Sky/Timing, Water, Save/Load, runtime API/events, multiplayer integration, URP/HDRP notes, performance guidance, and troubleshooting are covered in the included documentation.