Burrow Flock System — Bird Flocks for VRChat Worlds

Bird flocks for your VRChat world: they fly round the sky, land on roofs, wires and the ground, and take off when someone comes close. A whole flock is one mesh and one draw call. Drop a prefab in your world: no UdonSharp knowledge needed.

▶ Video: https://youtu.be/THJB7KoSlhY

FLOCKS IN THE SKY

• Up to 256 birds per flock, one mesh and one draw call
• Flapping, gliding and banking in the turns, animated on the GPU
• Presets: Tight ball, Wild, Free roam, Few, Thermal, Garden
• Count, speed, spread, groups, gliding and banking are all settings

THEY LAND

• One bird per spot, on the ground, posts, roofs, wires or flowers
• They come in, stay a while and leave
• Walk up and they take off, shedding a feather or two
• Moods: Calm, Normal, Skittish, Busy
• At night they come down and stay quiet; in the morning they leave one by one

PLACE THE SPOTS BY CLICKING

• Paint spots in the Scene view
• A row along a ridge or a wire
• Fill the top of a roof or a wall
• Face them all toward something, drop them to the ground, undo with Ctrl+Z

FEED THEM, SCARE THEM

• Bird feeder: a pickup that throws crumbs in three handfuls, and the birds come down round them to eat
• Scare zone: a trigger that sends the listed flocks off
• A toggle each player uses for their own screen
• _ScareAll, _Night, _LandAll and more for your own buttons

ONE PANEL FOR ALL OF THEM

• Pick a flock: count, speed, spacing, gliding, live
• Scare birds · bird night · birds on/off · reset
• Counts the birds and the draw calls in the world
• Changes are for the player who makes them
• Two looks included: dark wood and light grey

LIGHT

• The demo scene draws 268 birds in 9 draw calls
• Sky flocks cost no Udon beyond the clock; perch flocks about 6 µs per flying bird and 0 per sitting bird (measured in the Editor)
• Flocks far away are not drawn (distance is a setting)
• The Inspector shows each flock's triangles, draw calls and Udon cost

6 SPECIES, OR YOUR OWN

Sparrow, pigeon, crow, seagull, vulture and monarch butterfly, with their calls and feathers.

Flock Baker turns any rigged bird with flap, soar and idle clips into a flock. Flock Doctor checks every flock in your scene and fixes most issues in one click.

SETUP

• Drop a flock prefab in your scene and it works
• Demo scene included: a white lab with every kind of perch and the panel

REQUIREMENTS

• Unity 2022.3.22f1 (VRChat Creator Companion)
• VRChat SDK Worlds 3.10.5 (made with it; UdonSharp included)
• Built-in render pipeline
• Platform: PC

WHAT'S IN THE PACKAGE

A .unitypackage with 6 baked species, sky and perch prefabs, the bird feeder, scare zone, toggle and control panel (two looks), a demo scene, full UdonSharp source, shaders, textures, sounds and the editor tools.

LICENSE

• Use in unlimited VRChat worlds, personal and commercial. You may modify it for your own worlds.
• Redistributing, sharing or reselling the files is not allowed.
• Credit optional: "Burrow Flock System by Burrow Studio".

Version 1.0.0 · Burrow Studio · also on BOOTH: https://aymshop.booth.pm/items/9085713