Small change to the advanced build mode.

[Raichor]

When remove mode from the advanced build mode panel is selected, left clicking should replace the blocks inside the preview box with the selected block in your inventory rather than place blocks above it, so basically a replace function.

 

[DrTarDIS]

...you mean the "replace block with current selection" checkbox in the remove/replace filter on the bottom of your ctrl menu?

 

[Raichor]

...How did I not see that?... :/ dammit