Custom Collision Model Question (3ds Max / UDK3)

Hey guys,

I’m running into a challenge that I haven’t been able to figure out. I was hoping someone here could answer my questions.

I am trying to create a custom collision model for my terrain block. I have posted an example picture below:

Now, it’s important to know that this block contains the actual terrain and grass all in one mesh.

You can see the current collision I managed to generate here using udk:

The problem with this collision is that it’s not accurate enough resulting in players that are walking on top of this terrain to randomly walk through the ground at certain places aka clip through the mesh.

Since I can’t generate collision using udk, I can’t use per poly collision because of the grass, there is pretty much only these options:

  1. Create custom UCX collision model.
  2. Perhaps seperate the grass and the terrain into 2 meshes, place them on the exact same place and have collision for just the terrain mesh. (I’d rather not do this)

Now, my questions are related to creating the custom collision model. I managed to create custom collision before for some meshes but never for this more “organically” shaped terrain.

**What is the best way to create a custom collision model (convex hull) for this mesh?

Note: I am using 3ds Max and (sorry) but this can only be done for Unreal Engine 3.**

I would really appreciate if someone could help me out here. Perhaps someone has some good tips to share or a very useful script or documentation to help with this. Like I said; I know how to succesfully create my own custom collision, but can’t seem to figure it out for this type of mesh.

Best Regards,