During development of TINY METAL I ran into issues where large textures were only using R8G8R8A8, aka 4 bytes per pixel, instead of DXT1 or another compression format. I wanted these textures to use DXT1 or another compression format to save space so the full 32bits per pixel was un-usable.
In our case the solution was the pad the images outside UE4 to be multiples of 4 pixels. Note that using the in UE4 “Power Of Two Mode” padding offered in the texture settings did not allow the images to use DXT1. Instead I was forced to resize the images outside unreal before importing them.
If you are on my site based on my Microsoft posts then I should maybe mention that I now work in the Japanese games industry. Its a pretty cool industry.
Bit of a late update here but back in February I released Super Battlelands on itch.io
You can download it for free here: https://0x143.itch.io/super-battlelands
Thank you to Uberren Phillips for providing the art and making the game with me!
This is what Super Battlelands looked like as of end of September