NOW

Any floor can get an actually floor to walk on. The roof is placed automatically.

Clean up the visual scripting nodes and rewrite so that other people could look at it and understand the structure. This would make it easier for people to make adaptations in the future is the project is available on marketplace.

These walls can be used to replace another wall from the building.

Within Substance Designer I will work on various materials that you can chose from and even adapt within UE4.

NEXT

This would allow you to select a side, floor, floor of side or a specific wall. Once selected you could alter what mesh and material should be placed in the selected area and possible other options.

This is part of the building blueprint. Building blocks are separate blocks of building within the same blueprint so that you could for example have a floor hang out over another floor and vice versa.

Draw rain pools, mud or destruction on roads, buildings, etc.