RenderQuality

How much work a renderer spends on the picture beyond decoding it correctly.

These are the passes a viewer notices and that FFmpeg cannot do for us, because they belong on the GPU next to the draw: removing the banding an 8-bit write creates, removing the banding the source already carries, scaling with something better than the sampler's bilinear, and enlarging animation with a network trained on it.

Every field's default is the behaviour the engine had before this type existed, and a renderer reads isNeutral to skip the work entirely. That is deliberate and is the ladder's first law: DISABLED IS BIT-EXACT. A build that turns nothing on writes the same pixels it always did, which is what makes each pass measurable on its own and what keeps the colour instruments honest.

Not every renderer can honour these. A renderer applies what it can and ignores the rest; the engine neither asks nor promises. On Android the shipping interop path decodes straight to a Surface with no shader of its own, so nothing here reaches it.