it's Actually, "Client_Realistic-space"
Step one
If you're using steam follow these instructions
STEAM INSTALLATION1 >> Right click blockland on steam library
2 >> Hit properties then click on the tab that says LOCAL FILES
3 >> Click browse local files
4 >> Drop the client add on into ADD-ONS
5 >> Restart blockland
Note : This works for all mods / gamemodes / environment files etc etc
Normal Installation1 >> Go to my documents
2 >> Click on blockland
3 >> Drop the add-on into add-ons.
Note : This works for all mods / gamemodes / environment files etc etc
Congratulations.