Customize or make you original Tileset with SAKAN.
http://store.steampowered.com/app/608680
It integrates smoothly in MV with the Tool/ RPG Maker MV Tools menu:
Windows:
- Open Tool / RPG Maker MV Tools
- Click on Select Path..
- Open the "tool" folder
"Tileset Builder" should appear in the Found Tools menu
- Select it and click on Add to register it to the Additional Tools Menu
Tileset Builder can now be started from the icon next to the "Play" icon, or the Tools/ Tileset Builder option.
Mac:
- Open Tool / RPG Maker MV Tools
- Select "Tileset Builder" in the Found Tools panel
- Click on Add to register it to the Additional Tools Menu
Linux: Tileset Builder does not currently support Linux.
Enjoy !