Render into the layer.

WebGL2 can attach one layer of a DataArrayTexture as a framebuffer target. This route renders a source slice into a native WebGLArrayRenderTarget, then samples the rendered array layer in the visible preview.

backend

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target

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layer

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writes

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pixel

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sample avg / p95

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Allocating an eight-layer framebuffer attachment…

This route covers native WebGL2 WebGLArrayRenderTarget layer attachment, setRenderTarget(target, layer), sampler2DArray preview, selected-layer readback, and teardown. It does not claim the official compressed head asset, exact dimensions/pixels, GUI/Stats presentation, device limits, or whole-example fidelity.

The source array is deterministic; every write renders only the selected layer while the target retains the full eight-layer texture.