Unity editor tool
Texture Optimizer
Folder scoped texture import rules across the whole project
Import settings are where build size quietly goes wrong. A rule table, a dry run, and the build delta measured rather than hoped for.
Overview
This project had two 8192-square source textures and a run of 4096s behind them, none of which anyone gets close enough to notice. 256 MB in the first two files alone.
The window scans the real textures, applies rules by folder and filename, and reports what the build and the cold load actually saved.