How to make an object impassable

I have a model that walks around in my game now and I also made a cube for him to interact with for testing. I was wondering how I can make it so when he collides with the cube he cant pass through it, while the cube remains immobile. I guess this would relate to a wall on a building too. How would I make it so I couldn’t walk through a wall on a building? Thanks for the help!

Set the cube “Static”, the player “dynamic” and use “servo controls” to move your player rater than simple motions.

I dont know you could raise the margin of your cube on the advanced buton, on the logic panel.