Pixel floor: a minimum size, by shape
A pixel floor is the smallest frame a surface will accept, usually stated once per shape: a vertical minimum, a horizontal one and sometimes a square one. On the generator side almost every cheapest tier clears them comfortably. As of 2026-09-12.
| Property | What it constrains | How often it binds |
|---|---|---|
| A minimum per shape | The delivered frame | Rarely |
| Stated with the shape | Both together, in one sentence | The shape usually binds first |
| Against a resolution ladder | The bottom rung | Only where the ladder starts very low |
Inclusion rule. What a published pixel minimum constrains, and how often it is the binding constraint against the generators on these sheets. Order. The form the figure usually takes first.
1A specification lists it beside a shape and they are not equal
A page stating a vertical shape and a minimum size for it in one sentence invites reading both as hard gates. The shape usually is; the pixel figure usually is not, because it sits below the cheapest tier a generator prices.
Saying that plainly saves work. Where a page publishes no shape, the check cannot be done at all, and that is the constraint worth chasing rather than the pixel count.
2The exception is a fixed small output
Where a page publishes one small resolution and refuses others, the floor can genuinely fail, and there is no rung to buy up to. That is rare and it is worth knowing which row it applies to.
Everywhere else the floor is satisfied by the request a campaign was going to make anyway, so the column is accurate and inert, which is a perfectly good thing for a column to be.
3It is also the one place a ratio name is not enough
A floor is in pixels, so checking it against a tier name requires a guess about what the name contains. A page that publishes pixel pairs settles the same question with no guess at all.
That is the strongest practical argument for pairs over names, and it applies to exactly this comparison and almost nothing else on these sheets.
A vocabulary entry: the definition, plus how the specification pages on these sheets usually publish it. Table checked 2026-09-12. Nearby entries: Ephemeral upload, Model identifier.
4From brief to placement
For ad work around “Pixel floor”, SceneMixer's pages explain how its ad projects are produced:
Typically 60–120 seconds, always 9:16 vertical, ending on a hook. SceneMixer's episode outlines are generated with that pacing, and setting a project to 9:16 makes every segment vertical (the default is 16:9).
SceneMixer, How to Make ReelShort-Style Dramas with AI — “How long is a ReelShort-style episode?” (read 2026-10-13)
Character sheets are always portrait and scene images always widescreen, whatever ratio the videos use.
SceneMixer, Vertical 9:16 or Landscape 16:9 — “Will choosing 9:16 make my character images vertical?” (read 2026-10-13)