Normal Map Normalize

Fixes or rebuilds the Blue (Z) channel of a normal map. • Recalculate (Standard): Derives Z from X/Y using z = sqrt(1 - x² - y²), then maps to 0.5-1.0 range. Use for standard tangent-space normal maps. • Recalculate (0-1 Range): Same calculation but outputs raw Z (0-1). Use when shader expects unmapped values. • Set to 0/0.5/1: Forces a fixed value. Useful for debugging or special shaders.