How does OpenLOCK Work
Terrain Tinker now uses an updated OpenLOCK system with inch units instead of letter codes. You can read about that change here
When building in TerrainTinker you will need to choose models of the right size so that they tessellate ( fit without overlapping) correctly. Here is an example:
You can find more example near the end of this article.
Here is a list of every OpenLOCK tile that may exist on TerrainTinker. You may not need to use all of them so don't worry about memorizing it! Just drag and drop each type into TerrainTinker to get a feel for how it works.
Some more Building examples: