The expressive update represents all of the future versions of Iris 1.6. Our goals for 1.6.X are simple: More capabilities, features & options to customize your survival, adventure, or even challenge maps! Some new features will be dead simple & easy to implement, others will be highly technical features for those who have been craving it!

• The new spawn system is fully operational, you can setup Iris to spawn entities in different target zones such as beaches, oceans, normal land, & caves.
• Added the ability to add entity spawners to noise features
• Added the ability to add noise features on objects placed (via placement options) which effectively allows entities to spawn near specific objects
• The Iris Data loader has been rewritten to support more data types reliably. This will allow us to add new features much more quickly now.
• Iris now supports expressions! You can design a math expression with custom variables & use the expression in noise styles. Styles are used everywhere! You can even use expressions inside of other expressions!
• Small improvements on the beta island terrain mode feature
• Small improvements on the beta cavern feature
• Iris engines now save persistent data about spawners & other useful information to help transfer data with frequent restarts / reloads
• The Iris Vision map now hotloads it's render target when the engine hotloads.
• Removed MythicMobs support for now as it was not working anyway (we will revisit mythic mobs in the future)
• Added full trilinear interpolation support in 3D carvers for the new cavern system including tristarcast!