OptionalpipelineKey variants by blend mode, not only by shader defines: true for WebGPU, where the blend state belongs to the render pipeline. Defaults to false (WebGL, where modes differing only in blend state share one program).
OptionalgetRead at compile time because resize or MSAA changes can replace the target.
What the session warms against. A null renderer/camera/scene or
?noBlendWarmupresolve to a disabled manager.