PostFx Signature Sheet

PostFx Signature Sheet is the pack's secret weapon for actually deciding things. Instead of eyeballing one theme, saving, switching, re-running - the endless trial-and-error loop that eats your afternoon - it renders a labeled contact sheet of every theme in a category applied to your image, all in one pass, as a single preview image. Pick the one that looks right, then set it on PostFx Apply and move on. It's a decision node, not a production node: you use it to choose, then bypass it or delete it.

Mechanically it leans on the same CPU postfx pipeline as the rest of the pack. It takes the first frame of your image batch as the sample (so feed it a single image, or it silently uses frame zero), applies every theme in the category at your chosen condition and strength, and lays them out in a labeled grid via the postfx contact-sheet builder. It writes a temp JPEG, reads it back, and outputs a normal IMAGE you can preview or save.

The inputs are few and mostly obvious:

• image (required) - your source. First frame is the sample.
• category (required) - signature (default), experimental, or all. signature is the market-standard set: real film stocks and industry grades like Portra 400, Cinestill 800T, Kodachrome, teal-orange, bleach bypass. experimental is the same themes' weirder cousins; all is everything. Start with signature.
• condition - same six shooting conditions as Apply (neutral, day_outdoor, overcast, indoor_evening, neon_night, night_flash). Keep it at neutral while you're choosing a theme; you can judge the condition effect separately.
• strength - 0.0 to 1.5, default 1.0, same semantics as Apply.
• columns - 1 to 10, default 5, how many themes per row. With 15 signature themes, 5 columns gives you three tidy rows. Drop to 3 if the cells get too small to judge.

Output is sheet, a single IMAGE - the labeled grid, ready for a Preview Image node or straight to disk.

Install is the pack install, no surprises: ComfyUI Manager (search ComfyUI-PostFx) or the manual clone plus pip install -r requirements.txt, then restart. CPU-only, no model downloads, tiny dependency footprint - it's the same single postfx package the other four nodes share.

Two things to keep in mind. First, this node is a selector, so its output is meant to be looked at, not saved into your final pipeline - once you've found your theme, drop it and set that theme directly on Apply. Second, it samples only the first frame of a batch, so if you're comparing looks for an animation or a multi-image batch, judge on a representative single frame rather than expecting the sheet to average your whole batch. And if a category ever looks like it's missing themes, remember the dropdown and the sheet are built from the same YAML catalog - a missing file in the pack install means missing entries in both.