Have you ever tried to build things like floating torches? Have you ever broken floating sand in some maps without any idea to recover it? Are you fed up of the complicated steps of making floating sand? Have you ever pasted something with WorldEdit and found modded blocks dropping all over the ground? Then this is for you!
(All these things can be done with MCEdit, but MCEdit does not support modded Minecraft or JEID. Using WorldEdit with this mod is recommended)
This mod disables some of tI he block updates (the ones caused by changes of neightboring blocks). This allows you to build strange things in game like floating sand, floating torches, water mixing with lava, "broken" nether portals, etc. It can also fix most of the WorldEdit pasting issues.
The effect can be toggled in game using /gamerule preventBlockUpdates true and /gamerule preventBlockUpdates false. The mentioned gamerule is a virtual rule(i.e. it won't appear in tab completion), since I dunno how to register a gamerule properly. If someone knows how, please tell me.
See the "Images" tab for screenshots.