PNG Sequence

Lossless, always sRGB, the safest "just works" still-frame format. No colour-space choice — PNG always writes standard display-ready sRGB.

Bit Depth

• 8-bit (default) — standard web/consumer precision.
• 16-bit — keeps more precision per pixel, worth using if the sequence will go through additional grading passes after leaving Transduce (reduces rounding/banding from repeated edits).

Include Alpha Channel

Adds transparency, useful for compositing.

Always straight (unassociated) alpha — no Alpha Type choice here. Every mainstream PNG consumer (browsers, OS image viewers, UI toolkits) assumes straight alpha, so that's the only convention that displays correctly. See Alpha Channels for why some other formats offer a choice and this one doesn't.