Chemistry-first RAW → film

In development

Your RAWs, developed.
Not filtered.

Mothlight treats a RAW file the way a darkroom treats light — it simulates the chemistry from first principles. Your photograph exposes a virtual emulsion, develops in a reaction-diffusion bath, and is printed through an enlarger onto color paper. The look isn't painted on top. It emerges.

See the transformation How it works

**Drag to compare.** Left, the sensor's clean digital record. Right, the same frame carried through simulated film chemistry — softer highlight rolloff, warmer dye response, and the tonality of a print.

The method

Not a filter. A darkroom.

Most "film looks" are a tone curve, a split-tone, and a grain overlay — a costume. Mothlight is the actual process, simulated: light, emulsion, developer, paper. Everything you recognize as film falls out of the physics rather than being drawn on top.

01Real chemistry, not curves

The RAW becomes scene light, exposes a spectral emulsion, and develops as a reaction-diffusion process — developer diffusing, exhausting locally, replenished by agitation. Contrast and edge effects are consequences, not sliders.

02Emergent grain & tone

The characteristic curve falls out of how far development proceeds. Grain is a stochastic silver model that peaks in the midtones and is resolution-independent. Nothing is an overlay.

03Color from dye layers

Color negative is simulated as three coupled dye layers with an orange mask and DIR interlayer effects, then optically printed onto RA-4 paper through an enlarger color head — the source of real film color, saturation and crossover.

04A recipe, not a preset

You don't pick a stock — you set the variables. Sensitization, developer time and temperature, agitation, interlayer coupling, paper grade, enlarger filtration. The look is what those choices produce.

Examples

RAW in, film out.

Each of these is a single unedited RAW carried through the full simulated chain. Drag any slider to reveal the original capture underneath.

**Rose.** Deep saturated reds held without clipping; foliage shadows that stay open.

**Architecture.** Highlight latitude on bright facades; a gentler, printed contrast.

**Car.** Paint and chrome rendered through dye layers rather than a saturation slider.

**Motorsport.** Punchy color that stays photographic, with emergent grain in the midtones.

How it works

From sensor to print, honestly.

Two halves, cleanly separated. Digitization turns the sensor's raw record into faithful scene light — no hidden clipping, no look. The darkroom then renders that light through physics, the same way every time.

RAW

Digitization

Sensor record → faithful scene radiance. Exposure placement, black point, highlight reconstruction — reconstruction, never tone shaping.

31 BANDS

Spectral upsample

RGB is lifted to a full spectrum so the film responds to color the way an emulsion physically does.

EXPOSE

Film

The spectrum exposes the emulsion's sensitivity layers — one for B&W, three coupled dye layers for color.

DEVELOP

Reaction-diffusion

Developer diffuses, exhausts and replenishes. The H&D curve, edge acutance and interlayer effects emerge here.

GRAIN

Silver

A stochastic grain model rises from the developed density — midtone-peaked, resolution-independent.

Enlarger & paper

The negative is projected through a color head onto RA-4 paper and viewed — the print's contrast and color balance.

Latitude in what was captured.
Physics in how it's rendered.

The recipe

Every variable is yours.

Mothlight's currency isn't a preset list — it's the parameter space. Dial the chemistry and a look falls out; save it as a recipe and apply it like a stock you invented.

Film type

Panchromatic black & white, or full color negative — a switch, not two products.

Sensitization

Slide from orthochromatic through panchromatic to extended-red; choose how the film sees color.

Development

Time, temperature and agitation — stand development to vigorous, with the contrast and edge effects that implies.

Interlayer (DIR)

Dial the color couplers that drive acutance and saturation — the modern color-negative signature.

Paper grade

Soft to hard, the color analog of variable-contrast paper — the real control over dynamic range.

Grain

Radius and strength of an emergent silver model — fine and quiet, or coarse and present.

Coming soon

Be first in the darkroom.

Mothlight is in development. Leave your email and we'll let you know the moment the safelight comes on.

Light, emulsion, developer, paper.

Your RAWs, developed.Not filtered.