Ok, first i made this mod, and i forgot to put everything on Mass: 0, so i remade it, and i put some objects inside of another, so i remade it, and this time everything just dissepears... every object dissapears, only thing left is floor and dollies. what am i doing wrong??

I believe this goes in support.

sowwy ill put it there 2 xD

Moved to Support.

Did you set the mass to something other than 0? 0 makes it all go poof.

If you still have the wonky tbm, post it in here so we can take a look at it. Thanks.

i think what he wants to do, is to make an object float, if it is so, when you are in the world bulder, press "F" and check the stactic box, so it becomes green, and voilс, the oject floats now!

I hope this helps you! ;)

Ok, here is my mod, all set to mass: 0, engage hight is supposed to be set to 500, and the rest demo settings

It's a bug. Null mass means infinite acceleration. Hence the disappearance.

Set the mass to 0.0000001 in the .tbm using notepad. It should do fine.