Schematica Mod is a mod created by Lunatrius for Minecraft. The mod allows you to recreate structures that you currently have by providing you with a virtual blueprint. Unlike other mods like WorldEdit where you can simply copy and paste the building to a different location or world, Schematica gives you a guide so you can build the structure. It does this by delivering a hologram version of the structure you wish to recreate. With the mod, you can export buildings to different parts of Minecraft without much difficulty but still construct it on your own. It is a mod that is perfect for Hardcore building.
Schematica Mod 1.12.2 and 1.11.2 gives you the ability to copy even the most complex structures without much trouble. All you need to do is follow the plan that appears like a holographic overlay so you can build it more accurately and much faster. This way, you can make other areas of your world a lot quicker than you normally could without the mod. So, despite not automatically transferring structures to different parts of the game, Schematica is still a handy mod to have installed. It is almost like having a stencil guide that you can use for building structures.
But what really makes this mod stand out from other similar mods is that you can choose to use different blocks in place of the one used in the original building. This basically means despite having the same schematics, the new structure can be an improved version of what it was copied from. The mod is forge-based so you do need to have the latest forge version to make it work. In addition, you also need to have LunatriusCore Mod installed for the build. The steps for installing the mod follows the same process of other mod installations, so it should be easy to do.