[Sinner]

Quote:

...but the pass thru i can make the stop and explode just fine on timers and distance formulas but they pass thru the wall first ...any sugestions on a way to detect collisions? please and thank you

The only way to prevent this is when you would have the diameter of the object, or the actual object size. Since you don't have either (only the middle X, Y and Z coordinate) I don't think this would be possible. If you only use 1 type of object you may determine it's diameter through trial-and-error, but that wouldn't be at all dynamic.