Is your feature request related to a problem? Please describe.

Item and entity modifiers both have conditions that change the model of the same item/entity depending on its state. However, blocks don't have this condition (or perhaps they do, but it's not listed on the wiki? ). Block states can only be checked in targets, which means that if I have a block with multiple orientations, I need to make each orientation separately into many files.

Specifically, I'm creating a linked texture for a blackboard block that uses both the Full Layout (border) and the Continuous (blackboard itself) textures, with four orientations. Since these two connection effects can't be used together directly, to achieve the desired effect, I need to create a separate model for each orientation of the border and use four modifiers to attach the border model to the blackboard.

Describe the solution you'd like

Add the same conditions function as items and entities to block modifiers, and enable them to rotate the model.