# MiniMax H3 two-droplet prompt: contact, form a neck, then merge

Make the middle of a two-droplet merge inspectable. A jump from two circles to one new blob, or an opacity crossfade, does not show the contact that this task requests.

**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 top-view PNG contains exactly two teal schematic droplets separated by a narrow visible gap on one muted plane. Their upper-left highlights agree, and four small corner crosses belong to the stationary plane. No hidden third droplet is implied. The separate three-panel guide sketches two regions, a connecting neck and a single wider region; it is an authored comparison, not a sequence generated by H3.

[Download the actual input PNG](/learning-assets/original-b-next-camera-20261022/two-droplet-contact-coalescence/S01-first-frame.png) · [Editable design SVG](/learning-assets/original-b-next-camera-20261022/two-droplet-contact-coalescence/S01-first-frame.svg)

## 2. Assign the moving and fixed roles

Count connected liquid regions rather than similar colors. Begin with two, observe where their nearest edges first meet, and then follow the same connection as it widens. The corner marks and camera stay fixed throughout.

1. Open the input at full size and locate the small gap between the two facing edges. If a replacement already has a bridge, it cannot test formation of the first contact.
2. Describe slow approach before neck formation, and neck formation before the final single outline. Remove splash, pouring, rolling camera and a color transition.
3. In a future result, pause around first touch. Check that the joining area grows from that contact, rather than a large replacement drop appearing elsewhere or a third piece filling the gap.
4. Follow the joined boundary through the end and record whether the two components became one. A rough apparent area can be noted, but it is not a measured volume or proof of conservation.

## 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 `S01-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-camera-20261022/two-droplet-contact-coalescence/practice-kit.zip) · [Blank observation sheet](/learning-assets/original-b-next-camera-20261022/two-droplet-contact-coalescence/acceptance.blank.csv)

## 4. Use the complete original draft

```text
Use the supplied original top-view illustration as the first frame: two teal schematic droplets with a narrow gap on a fixed muted surface. Lock the camera and preserve the four background corner marks. The two existing droplets slowly move toward each other. Their facing edges first touch at the visible gap; a small connected neck forms there and gradually widens. Continue into one connected, slightly wider droplet and stop. Keep the outline and highlight changes continuous enough to follow the original two regions through their contact. Do not crossfade two transparent circles, cut directly to a replacement blob, add a third droplet, splash, split or zoom the whole image. End with one connected droplet and an unchanged surface. This is a qualitative illustrated connection task, not a fluid simulation or a promise of exact volume or surface-tension behavior.
```

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 opening contains exactly two independent droplets with a visible gap.
- The first neck appears at the point where the two facing edges actually meet.
- That neck widens continuously; no remote third region replaces the pair.
- Two connected components become one without a cut, translucent double exposure or fragmentation.
- Plane marks and camera stay fixed, and no new liquid or particles appear.
- The ending has one quiet connected outline; apparent area is recorded as an observation, not a volume measurement.

## 6. Repair one failure without changing the task

- If one large blob pops into view, change only the ordered contact clause and inspect the first-touch interval again.
- If the droplets crossfade through each other, remove only opacity/transition wording and restate that the joined outline grows from the contact neck.
- If a third drop bridges the gap, explicitly preserve the original count until contact; do not add a splash effect to hide the extra region.
- If the entire plane scales, reinforce only the fixed camera and corner marks before judging the merge.

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

Save observations before contact, at the first visible neck and after one outline remains. Do not mark the neck check passed using only the last frame.

No model task or physical droplet experiment has run. Surface tension, optics, viscosity and exact conservation are outside this schematic visual exercise.

Bubble release asks a connected neck to break; this asks two regions to make a new connection. A falling slice is one rigid object contacting a surface, not two liquid outlines joining.

- [Bubble release and a separating neck](/templates/soap-bubble-release-wand)
- [One falling slice and its surface contact](/templates/fruit-slice-one-drop-contact)