Photopea / Photoshop ExtendScript Dataset Generator

This folder contains JSX scripts to generate systematic layer-effect ground-truth images in Photopea or Photoshop.

Files

generate_inner_shadow_dataset.jsx — Short starter script for Inner Shadow.

Usage

Open Photopea (https://www.photopea.com) in a browser.
Press Alt+Ctrl+I (or use File > Automate > Script) to open the script runner.
Paste the contents of the desired .jsx file and run it.
Select an output folder when prompted.

Photopea will create a new document for each parameter combination, draw a black rectangle, apply the Inner Shadow effect, hide the background, and export a transparent PNG.

Current parameter grid (short version)

Parameter	Values
angle	0, 90, 180, 270
distance	5, 15, 30
size	10, 30
choke	0, 20
fx opacity	75, 100
fx blend mode	Normal, Multiply

Total images: 4 × 3 × 2 × 2 × 2 × 2 = 192.

Notes

Blend mode keys use Photoshop's 4-character codes (Nrml, Mltp).
The output PNGs have transparent backgrounds, so MAE comparisons can ignore white reference pixels if needed.
ExtendScript error handling is basic; if a parameter combination fails, the script logs it and continues.

Next steps

Add more layer blend modes, fill opacity, and layer opacity variations.
Extend to Drop Shadow, Outer Glow, Inner Glow, Stroke, Bevel & Emboss.
Add a companion Rust generator that creates matching PSD files so the same dataset can be imported back into HCIE for MAE tuning.

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