Going to post my community map, probably you will like it. Initially made for a russian community, but can be used anywhere else.
[tab]Description:[/tab] Flatgrass-styled map with some simple things to build.
[tab]Requirements:[/tab] Counter-Strike: Source, Garry’s mod
Flatgrass, full hammer grid of it.
Rails. Build trains!
Water for boats, but not really deep…
“Lagless rooms”. Perfect for building wire things in multiplayer.
Area for testing cars.
Big billboard with map name and author. And some smaller billboars, Lua coders can place some entities there, like advertisement.
3d skybox so it won’t feel empty.
(advertisement not included, screenshot of example what can be done, also it is v1)