Which image formats can be compressed best in Unity?
(I.ex. *.png -without alpha channel- cannot be compressed as well as *.tga or *.tif)
Are there any preferences?
The format of your source textures has no effect on the quality or size or performance of the textures in the game.
In game, best performing are DXT compressed formats.
In your workflow, it’s possibly bestto use PSD files directly.