evaluating-background-changes

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更新日2026年5月14日 17:35

Guidelines for evaluating background replacements and scene changes.

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TIGER-AI-Lab/RewardHarness

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Evaluating Background Changes

When a prompt asks to change the setting (e.g., "grassy savannah", "sold out concert", "elementary school cafeteria"):

Foreground Preservation: The main subjects (e.g., polar bears, people) MUST remain intact and unchanged unless specified.
Background Accuracy: Does the new background clearly represent the requested scene? Look for specific contextual clues (e.g., stage lighting and crowds for a concert, trays and tables for a cafeteria).
Lighting and Shadows: Do the lighting and shadows on the foreground subjects match the new background? Mismatched lighting makes the edit look like a cheap cut-and-paste job.

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description	Guidelines for evaluating background replacements and scene changes.
name	evaluating-background-changes
type	skill

When a prompt asks to change the setting (e.g., "grassy savannah", "sold out concert", "elementary school cafeteria"):

Foreground Preservation: The main subjects (e.g., polar bears, people) MUST remain intact and unchanged unless specified.
Background Accuracy: Does the new background clearly represent the requested scene? Look for specific contextual clues (e.g., stage lighting and crowds for a concert, trays and tables for a cafeteria).
Lighting and Shadows: Do the lighting and shadows on the foreground subjects match the new background? Mismatched lighting makes the edit look like a cheap cut-and-paste job.