Hatches

[Steve616]

Have floor hatches for roof access instead of door way either sliding or hinged would work within the current build system. And an option of free placement blueprints give us a little more freedom of the shapes and structures angles as well as keeping the snap which needs a little work still. 

A most used section would be a qol too instead of switching between wall floor roof tabs the most used would be added to that section making it slightly more efficient to choose the blueprints