I made the image: artifacts/image.png is a 512 × 512 PNG. I looked at the rendered result and it matches the brief. I couldn't commit the source files because git has no author name or email set up here, so README.md and tools/ are staged but not committed.

How it was made: I drew it pixel by pixel in a Python script on a 32 × 32 grid, then scaled it up 16 times with hard edges. So the pixels are square and there's no smoothing, blur or gradients. I didn't use an AI image generator. The image uses only 8 colours, all from the allowed palette.

What it shows:

• One alien, facing front and centred. Its round head is swamp green, with darker moss green shading along the jaw.
• The eyes are black dots, each with one white highlight pixel. It has a small flat mouth and nothing on its head.
• It wears a navy suit with a cobalt edge on the shoulders, a white shirt in a V, and a brick-red tie. The shoulders reach the bottom edge.
• Every shape has a thick black outline.
• The background is solid #0c1610 with five small green specks. There's no text, frame or border.

Unmet requirements: none that I know of. I haven't compared it with other pieces in the 787-piece set, so I can't confirm it fits in with them.

Files:

• artifacts/image.png: the image, left untracked as instructed.
• tools/make_iu_0224.py: the script. Run python3 tools/make_iu_0224.py (needs Pillow) to rebuild the image exactly.
• README.md: records the size, format, palette and the limitation above.