---
unit: heroes/iris-venn
file_prefix: iris-venn
status: draft
mode: template-composition experiment v2
version: v004-template-exp
date: 2026-05-19
image: iris-venn_2026-05-19_v004-template-exp.png
art_source: iris-venn_2026-05-18_v003-template-art-source.png
template: 03-tools/template-experiments/hero-reference-sheet-template-v002.png
compose_tool: 03-tools/template-experiments/fieldvault-compose-hero-sheet-v2.py
crop_preset: v003-tuned
experiment: template-composition-v2
---

## Verdict

**Composition v2 improved** vs v003-template-exp: better crop alignment (bottom-anchored figures), template v002 header band and corner guides (no hollow callout boxes). **Not promoted.**

## What changed from v003 experiment

| Area | v003 (v1) | v004 (v2) |
|------|-----------|-----------|
| Template | v001 full rectangle zones | v002 taller header, corner guides |
| Compose | v1 fractional crops | v2 `v003-tuned` preset, per-zone scale, bottom anchor |
| Art source | v003 art (new API) | **Reused v003 art** — no new API generation this pass |
| Overlay | none | Header-only on copy (`template-header` profile) |

## Caveats

- Art remains a **single combined canvas**; crops are still approximate.
- Side/back zones slightly tight; equipment cluster acceptable.
- Header overlay minimal; margin_notes band still empty (annotations deferred).

## Related outputs

- Overlay: `iris-venn_2026-05-19_v004-template-exp-overlay.png` + `.overlay.md`
- Report: `reports/2026-05-19-field-command-template-composition-v2.md`

## vs full-sheet v002

| | v002 full-sheet | v004 template-exp |
|--|-----------------|-------------------|
| Placeholder boxes | Major issue | **None** |
| Layout | Model-driven | **Vault template** |
| Ops steps | 1 generate | template + compose (+ overlay) |

## Next

- Optional: generate art with `iris-venn-template-art-only-v2.md` and add `v004-template-art-source` if cluster separation improves.
- Tune `v003-tuned` crops or add `v004-art` preset after new art source.
- Do not replace full-sheet pipeline until unit-sheet trial.