Keeping character scale consistent in MiniMax H3 Ref2V: prompting tricks that mostly fail

fluvialcrunchy · reddit · 2026-09-16

A creator working with MiniMax H3 Ref2V reference-to-video finds relative scale between characters/objects hard to keep consistent — even within the same shot.

Prompting like '<subject 1> is slightly taller than <subject 2>' has limited success. They ask whether the model can read a scale bar or centimeter measurements from a character sheet, and note first/last frame references help but don't fit every project. Seeking community best practices.

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