# MiniMax H3 line-reveal prompt: extend one stroke along the visible guide

Reveal a single pre-defined line in a readable order. The change belongs to the visible extent of one stroke, not a moving pen, dust clearing, handwriting or the appearance of a new illustration.

**Original practice illustrations and an untested method.** No H3 task has been submitted and no generated result is included.

## 1. Establish the authored starting state

The PNG contains one faint angular path on a plain canvas and a short dark starting segment at its lower-left end. The path climbs vertically, slopes to a high centre, descends to the right and finishes down the right side. The complete faint guide is already visible; it is not hidden content for a model to guess.

[Download the actual input PNG](/learning-assets/original-b-next-creative-20261022/single-path-line-reveal/first-frame.png) · [Editable design SVG](/learning-assets/original-b-next-creative-20261022/single-path-line-reveal/first-frame.svg)

## 2. Assign the moving and fixed roles

Follow the path from the dark lower-left beginning to the faint lower-right endpoint. There are no branches or crossings. The faint guide fixes where the stroke may grow, while the existing dark segment fixes the starting end.

1. Compare the original dark start and faint endpoint before uploading. If replacing this source, draw an unbranched guide yourself and make its starting end unambiguous.
2. Keep drawing-front progression separate from camera or tool motion. A hand drawing the line would introduce a new contact task and is excluded from this attempt.
3. For a future result, pause at each corner and check that the active drawing front reaches it before the next segment darkens. The final shape alone cannot establish the reveal order.

## 3. Prepare one manual generation attempt

Use the current **MiniMax H3 base image-to-video** controls. Under the currently documented site workflow, enable **Add end frame** to expose **First Frame**, upload only `first-frame.png` there and leave **Last Frame** empty. This draft does not use Fast, which needs a paired input. Recheck the actual available controls and credit estimate before any manual submission; these files neither upload themselves nor start generation. SVG files and the separate review guide stay local as design/review materials. No duration, resolution or endpoint capability is promised by this method.

[Download the practice package](/learning-assets/original-b-next-creative-20261022/single-path-line-reveal/practice-kit.zip) · [Blank observation sheet](/learning-assets/original-b-next-creative-20261022/single-path-line-reveal/acceptance.blank.csv)

## 4. Use the complete original draft

```text
Start from the supplied original faint-path illustration. Lock the camera and preserve the plain canvas and the complete faint guide. Extend the existing dark teal stroke continuously from the upper tip of its short lower-left starting segment, following the already visible connected guide: up the left segment, along the rising diagonal to the top, down the right diagonal, then down the final right segment. Previously darkened portions remain dark and in place. Advance one connected drawing front; do not darken disconnected distant segments at the same time. Do not add a pen, hand, lettering, extra branch, second line or moving background. Finish when the original guide is covered by the same single dark stroke, then hold. Do not replace the path with another icon or cut directly to a finished drawing.
```

The copyable generator draft is the English version; the paired Chinese draft is included for review.

## 5. Inspect the actual result in sequence

Do not fill a pass from the input or from the intended ending. Enter observations only after examining actual result frames. The downloadable sheet has empty observation and result fields.

- The original canvas and faint guide remain in their positions.
- One dark connected front extends in the stated segment order.
- Already completed dark segments neither disappear nor move.
- No isolated dark segment, new branch, pen, hand or lettering appears.
- The ending retains the original complete path without replacing it with a new shape.

## 6. Repair one failure without changing the task

- The entire guide darkens at once: emphasise the one advancing front and shorten the path for a later replacement source, without adding a tool.
- The line jumps across a corner: compare that corner first and simplify only the progression sentence; do not accept a matching final silhouette as a pass.
- The shape becomes a different icon: keep the original faint guide explicit and remove style or logo language.

## 7. Save the ending and choose the right next task

Keep the corner-by-corner observations with the resulting clip if one is later made. Leave the sheet blank until actual frames have been reviewed.

No H3 run or result is included. This method is not a claim of vector-path animation, accurate handwriting, exact logo reproduction or engineering-diagram fidelity. For exact path timing, use an editor and the original SVG.

Use the dust-clearing task to inspect a tool touching a surface and displacing particles. Here there is no tool or particulate material: the task is the ordered visibility of an already defined line.

- [brush clears dust track](/templates/brush-clears-dust-track)
- [page turn with post composited text](/templates/page-turn-with-post-composited-text)