Make size a live attribute.

Points turns one vertex into one camera-facing particle. This fixture keeps the official custom size attribute, vertex colors, perspective attenuation, sprite sampling, and per-frame CPU upload visible.

backend

WebGL2

particles

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attributes

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material

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sprite

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frames

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sample avg / p95

NOT RUN

Official random field, Stats panel, exact page/pixel fidelity, shader compiler/device matrix, driver upload inspection, device-wide performance, native WebGPU parity, context-loss stress, and whole-example fidelity remain separate.