One block. Many lights.

A GLSL3 UniformsGroup packs position and color arrays into one std140 LightingData block. Every specimen reads the same array while the active light count and motion change on the CPU.

backend

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std140 block

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active / max

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sample avg / p95

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draw calls

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radius

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Allocating position and color arrays in one shared block…

This route covers native WebGL2 array-valued UniformsGroup entries, a runtime light-count value, shared GLSL3 std140 reads, mutation, and teardown. It does not claim the official 300-light field, exact random layout, Stats/GUI presentation, driver buffer inspection, or whole-example fidelity.

The shader loops only to the active count; the maximum array size stays fixed so material rebuilds are independent of count changes.