Per-instance variation for MultiMesh crowds
In your harnessGodot shaderMIT
Give thousands of MultiMesh instances individual looks and motion from INSTANCE_ID alone: hue and brightness variation, random height scale, and a bobbing wave with its own phase per instance.
What it takes and gives
- Shader type
- spatial
- Parameters
- base_color (vec4 = 0.25, 0.6, 0.85, 1), hue_variation (float = 0.35), brightness_variation (float = 0.3), height_variation (float = 0.8), bob_height (float = 0.12), bob_speed (float = 2), roughness (float = 0.6)
- Use it on
- A MultiMeshInstance3D; meshes should have their base near object y = -0.25 (or edit
basein the shader). - Result
- A field of blue, teal and violet boxes of different heights bobbing out of step.
- Renderers
- compatibility: compiled and rendered, forward plus: not verified, mobile: not verified
- Placement
- res://baltor/godot_shaders/multimesh_instance_variation/
Limits. Variation is tied to the instance index, so reordering instances changes their looks. INSTANCE_ID is 0 for a plain MeshInstance3D, so all copies look the same there. Normals are not adjusted for the height stretch (fine for boxes and columns).
Details
- Kind
- Godot shader
- Engine
- Godot 4.3 or later
- Files
- 11 files, 64.7 KB
- Licence
- MIT
- Declared effects
- reads files, runs commands
- Checked with
- Godot 4.7.2, opengl3 compatibility (Mesa llvmpipe, Xvfb)
- Checks
- contract static, engine run, engine log clean, shader in scene, capture written, render not uniform, shader changes pixels
- Techniques
- Hashed INSTANCE_ID per-instance randomness (MurmurHash3 finalizer), Hue rotation about the grey axis (Rodrigues rotation), Per-instance phase animation
- Tags
- godot shader, spatial, multimesh, instancing, variation, crowd, vertex animation
- Identity
library.supply.creative_originals.bc9987a79983b0cf6fdf9fa5.a044383ce821aef7- Version
a044383ce821aef7aae2399c14762282255207f8163a6f3074651f53fd80cba8
The version is the SHA-256 of the item your harness downloads; every file in it names its own checksum.
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