Border Constraint

The border constraint is a generator constraint which restricts which tiles can appear on the outermost set of cells of the generator output.

It is similar to placing volume initial constraints, except it automatically works out which cells to affect.

Usage

Simple add the border constraint to the generator, then select which tiles to use for each border.

You can re-order the sides. Whichever side comes first takes priority for cells that are on multiple sides, i.e. corners.

Comparison with Skybox

The border constraint has very similar functionality to skyboxes. But they have different advantages.

	Skybox	Border
Constrains cells	by matching the paint they have along the border	by tile
Controls tile rotation	Yes	No
Works with overlapping models	only if you add paint	yes