# Drawing calibration for mass production

Updated: 5 October 2026 (Asia/Shanghai).

The original six directions are preserved: C1 — tea engraving, C2 — large letter ensemble, C3 — tea collection map, C4 — regional atlas, C5 — friendly parade of places, C6 — dynamic print graphics. C7 is based on photographs of the owner's real tourist mugs.

In the first mass run, some responses amplified the soft raster edges of the input image: blurred architectural spots, muddy captions, rectangular crops appeared. Therefore, for the next independent generations, already reviewed clean regional implementations of each direction were chosen. They convey only the graphic language. Content, local facts, name, palette and composition are described anew in each individual prompt.

Style calibrators: C1 — FJ_C1, C2 — CQ_C2, C3 — GS_C3, C4 — CQ_C4, C5 — CQ_C5, C6 — FJ_C6. C7 — CQ_C7 and a photograph of a Guangzhou tourist mug. The white backing in the service JPEG is needed for reading reference lines; it should not be transferred to the final PNG. It is separately checked that the model does not copy the source region.

When regenerating, two versions of the same clean style sample are compared: JPEG on white and PNG RGBA with transparent gaps. Both formats can help read the line, but neither alone guarantees a transparent model response. A baked-in checkerboard and an opaque white background are considered technical defects. The drawing is not cleaned by threshold white removal; the generator recreates a true transparent master.

Each rejected attempt with the exact prompt, image, and reason is saved in history. The next attempt receives a new provider ID. Accepted files and their prompts are linked by SHA-256. The public archive contains the prompt text that generated the selected image, not a later editorial retelling of the task.

RGBA is checked against real alpha channel values. Opaque RGB is not accepted even with background=transparent in the request. Export does not draw transparency over a white background and does not stretch the image. Outline and captions are additionally reviewed by a visual critic agent; this is curatorial acceptance for the gallery, not an assertion of industrial print run ownership.

For the final correction of GX_C1, the clean accepted NM_C1 was additionally used as a sample of two-color engraving and transparent gaps. The Guangxi content is set anew; Mongolian subjects are not transferred.