According to the Curse page at https://mods.curse.com/mc-mods/minecraft/225603-schematica,
Schematics are shared across worlds, servers, and gamemodes, allowing you to build something in Creative mode locally before building a copy of it on the server.
Schematica is a client-side mod. It can work in two different modes, hologram mode and printer mode, which work on all practically all servers, including Vanilla ones.
Hologram mode shows a hologram of a previously-copied schematic, showing you where to place the blocks.
Printer mode actually places the blocks for you out of your inventory. There are a few restrictions to printer mode, but it is overall extremely cheaty, as it can place blocks almost instantly, as long as they are in the player's inventory, within reach of the player, and have some block next to them to place against.
In my opinion, hologram mode should be allowed, as it is very helpful for things like circles or repetitive redstone, but not the printer mode. I also think that it should be against the rules to use the mod to directly copy someone else's (non-redstone) build onto the server. Redstone should be an exception to this because of the complexity and modularity that many redstone builds contain, and that people frequently replicate them anyway, in particular through YouTube.
Quote:
The mod allows you to display a hologram, loaded from a schematic file, for easier rebuilding. You can also save your creations to schematic files and share them.
Schematics are shared across worlds, servers, and gamemodes, allowing you to build something in Creative mode locally before building a copy of it on the server.
Schematica is a client-side mod. It can work in two different modes, hologram mode and printer mode, which work on all practically all servers, including Vanilla ones.
Hologram mode shows a hologram of a previously-copied schematic, showing you where to place the blocks.
Printer mode actually places the blocks for you out of your inventory. There are a few restrictions to printer mode, but it is overall extremely cheaty, as it can place blocks almost instantly, as long as they are in the player's inventory, within reach of the player, and have some block next to them to place against.
In my opinion, hologram mode should be allowed, as it is very helpful for things like circles or repetitive redstone, but not the printer mode. I also think that it should be against the rules to use the mod to directly copy someone else's (non-redstone) build onto the server. Redstone should be an exception to this because of the complexity and modularity that many redstone builds contain, and that people frequently replicate them anyway, in particular through YouTube.