A compile tool that provides a templating system, several macro entities and a scripting system. Can be used to automate various tasks, such as reusing complex entity setups as if they were a single entity, or covering terrain with props, among other things.
MESS is a Half-Life (GoldSource) level compile tool that helps automating various tasks. It provides a templating system and several macro entities for creating template instances, which can be customized with a basic scripting system. And with entity rewrite rules, templates can be used as if they were actual entities.
Here are some of the things that MESS can do:
See the readme for more information.