If you look the way to make change in your MCPE texture, I recommend look carefully on this texture pack. It called TT Resource Pack for Minecraft PE and it will change some texture in your game. Creator try to fix bugs and systematically make update, so maybe in feature it will top graphic texture pack.
screenshots from this texture pack you can see below this text
Download this texture pack for Minecraft Pocket Edition 1.4/1.5https://www.mediafire.com/file/ca2h…
How to install?
- Tap on the file ( it will be installed automatically )
- Open the game – Settings – Global resources – find your texture/shader