Halation
The soft red-orange fringe that film can produce around intense highlights, especially lamps, windows, and reflections.
See it
What it is
Halation is the soft red or orange halo that can form around intense highlights on film. Light passes through the emulsion, reflects within or behind the film base, and exposes nearby dye layers on its way back. CineStill 800T is known for conspicuous halation because its original cinema film stock is sold without the remjet backing that normally helps control the effect.
Reach for it around practical lights, windows, chrome, and other small hot highlights when a digital frame needs a photochemical cue. Build it from a thresholded highlight mask so the warm bleed stays close to the source while the white core remains bright.
Gotcha: halation is not ordinary bloom and it should not outline every bright object. Bloom spreads the highlight's own color more broadly; halation adds a tighter warm fringe. If skin, midtones, and whole skies turn red, the mask is too loose.
Ask AI for it
Add restrained film halation in DaVinci Resolve with the Glow OFX: feed it a luminance key limited to the hottest highlights, set a small spread, tint the outer glow red-orange, and composite it behind the untouched white cores. Keep skin, midtones, shadows, and broad areas of sky free from the effect.