Feature Request: Download option for supporting blocks only in staircasing

[BeithirGestalt]

For maps that utilize both staircasing and blocks that are deemed "important blocks" such as carpet and sand that need blocks under them, it can be a pain to build the staircasing. What ends up happening, is "Important blocks" will obstruct your vision in schematica of the actual block you need to place beforehand to build the staircasing support.

This is resolvable on the user end with things like cubical or MCEdit but can get increasingly tedious for anything more than a 1x1. If there could be a setting to download an NBT of just the non-important blocks separate that would be heavily appreciated.

Thanks again for the awesome program and all the work you do to make mapart more accessible for everyone.