Requires 64-bit java for MC version greater than 1.8

ISM is a mod that lets you place structures like a 
house by only one mouse click. This mod simplifies to build a city and 
shows you great buildings created by other users.
Features:
- place a structure per mouse click
-replace/place blocks in an specified area
-create/resize a square

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-more complex structures
-structures will be placed in the direction you are looking
-size indicator
-extra features (see above)