UV Scaling vs Texture Size in Unreal Engine

The author discovered how UV coordinates control texture tiling in Unreal Engine: multiplying UV values increases repetition while dividing makes textures appear larger, since texture space maps 0–1 and values beyond 1 cause repeats. They also learned that normal maps store surface direction data via RGB channels (R=X, G=Y, B=Z) to fake lighting detail without adding geometry, explaining their characteristic purple/blue appearance.