Instances the buffers hold.
Rebuild key of the geometry.
Per-instance (hue, brightness, pattern phase, random).
Bounds of this frame's instance positions (anchor-relative).
Instanced mesh (count = animals drawn this frame).
Bounds of this frame's instance positions (anchor-relative).
Per-instance (phase, amplitude, bend, second phase).
Instances needed this frame.
Largest instance scale this frame.
Instances written this frame.
What a layer draws for one species: one instanced mesh and its per-instance buffers.