Check the new version: WorldEditCUI Forge Edition 3 for forge 1.9.4 to 1.16.5
This mod provides a client-side user interface for the WorldEdit plugin allowing you to see your selected region in-game in real time. It allows you to work more quickly and accurately with your WorldEdit selection and is especially useful when working with Polygon, Convex Hull and Cylinder selections.
This is a complete rework and a fully recoded version of WorldEditCUI Forge Edition with great improvement. However, WorldEditCUI Forge Edition 2 is only compatible with Minecraft versions starting from 1.11.2. If you are using an older version, consider using WorldEditCUI Forge Edition (first forge edition).
Display your WorldEdit selection instantly in-game
This new version has been highly improved.
Every single color can now be changed using a new style of the options screen.
Choose the color that fit your feeling.
You are no longer limited to Minecraft colors.
See screenshots below.
To install the mod:
Download the latest version of the WorldEdit CUI Forge Edition 2 for you forge version and copy it to your mods folder.
To use WorldEditCUI Forge Edition 2, simply make a selection on a server using WorldEdit, your selection will be instantly displayed on the screen. To clear your current selection issue the command //sel
WorldEditCUI Forge Edition 2 include new features :
If you feel the need to donate to this mod, then simply click the button below : 
Of course, you'll be added as a donator.
