Thanks skarn
Sadly it dont seem to work the way i hoped it would. My problem seems to be a bit diffrent then i thought.
i made a huge platform. and Sized a m2 wall that normaly has collsiion to around 17,7x its size and its lost collision in the process.
next tried to replace them with the ti_large walls,they have a giant standart size, but no collision either, even after using collisionadder on them.
Im thankfull for any Clue how to solve it.
Here the Thign i work with (the Small thing on the ground is a Human scale model)