create-asset-sheet

Call summer_generate_image with a prompt listing 6-20 isolated items, then pass the returned asset id to summer_slice_asset_sheet. The slicer removes backgrounds, detects and names each item, classifies it, crops it, and saves everything as one pack ArtAsset.

It supports tile sheets, UI kits, menu screens, character packs, and biome sets. The classifier outputs categories like character, terrain, nature, buildings, ui, and vfx to route slices into downstream pipelines.

Use grok-imagine for pixel art and gpt-image-2 for painterly, illustrative, or structured grid styles. Generate at 1024x1024, since larger sheets fragment when individual assets drop below roughly 64 pixels.

Overlapping items or missing gaps in the source image cause merged or missed detections. Re-prompt with explicit isolation instructions, generate at higher resolution, or reduce the number of items per sheet.

Avoid it for single assets, character animation frames, seamlessly connecting terrain tiles, or 3D model packs. Use pixel-art, sprite-sheet, tileable-texture, or concept-art with image-to-3D for those cases instead.

A 12-asset sheet costs about $0.12 without upscaling, covering generation, background removal, and vision classification. Adding a full bulk upscale of all slices brings the total to roughly $0.60.