Nitrate

One decision before the shot

Pick a stock and a gauge, then shoot. The monitor shows a neutral image rather than the look, so the emulation arrives when the render finishes — the way film behaves, not a filter over a preview.

The original is kept

Capture writes a real Apple Log recording. The film look is a render of that file, so the original is never destroyed and the look can be redone.

Film behaviour, not a colour wash

Halation, glow and grain are modelled as physical effects with per-stock geometry, not a texture laid over a lookup table.