Hello

[dmpdesign]

Open up your object in the objedit.exe program. ‎  There you can set the parameters of the collision.

If your object will be box-like you can choose cubic collision (this lets you determine the x,z and y size of the object.) ‎  All measurements are in tenths of a meter. ‎  So .1 will be 1/10 of a meter or 1/20 the size of a map tile.

I would open your object profile, adjust it to a rather small collision and test it as needed until you get the right size. ‎  Be sure to re-register your object in the object editor in SOM and re-output the map its in so you can see the changes to the object.