I'm trying to make a mod for a game called Potion Explosion. The marble dispenser for the game is I guess too complex for the collider. I have tried exporting from Blender into UE4 to make a custom collider, I have also tried to export pieces of the marble dispenser to see if I can even get a marble to slide down the ramp. The model I was using for the ramp was 188 triangles but the marble just rolled down the ramp suspended in the air. I have seen mods offering Dice Towers that allow objects like dice/marbles to pass through them, so I feel like this should be possible.

I am very new to 3D modelling, I apologize if I'm missing some information needed for assistance. Any advice or assistance is greatly appreciated.