Once the build contains only the required assets, developers can further optimise the size by tweaking export parameters of specific assets and folders. Most of such optimisations are "free": chaging an image format from PNG to JPEG might yield as much as 80% of size reduction with little to no visual differences and little to no startup time cost. Similarly, switching the sound file to Mono and reducing the bit rate might be unnoticeable to most users and can yield significant savings in terms of the wire size.
We suggest starting your optimisation with the assets that take most of the space in compressed build.
Optimising various asset types
Please navigate to sections listed below to see how Luna can help reducing the build size in a quick and non-destructive manner.