I’m trying to use 3DS Max to export a mesh that has both LOD and collision. I have followed the instructions on the wiki for setting things up to export both separately, and they do work separately, Max crashes every time I try to export them together. Are there any special settings that are needed?
My current setup:
I have two meshes that are grouped, called Mesh and Mesh LOD1. I also have a bunch of collision geometry, named UCX_Mesh_00 and so on. No collision for LOD1. Animation is checked on export (though the crash happens even if I uncheck it).
Collision is not supported with specific LODs in UE4. You can only have the collision that is setup for the entire mesh, which is not LOD specific.
So for example, if I set up a CUBE as my base mesh and then on LOD1 I use a SPHERE. If I use BOX collision for my base mesh this will use the box as the collision shape rather than switching to a sphere.
I am only using one collision setup for both LODs, but how do I export them out together? Eg. what do I name the collision meshes with regards to the object meshes?
I’ve not tried it myself with box the LODs and the UCX collision.
You should be able to setup your LOD mesh with the multiple LODs in Max/Maya and have the simplified collision mesh or meshes labeled accordingly with the assets named like so UCX_[MeshName]_XX, where XX is a number reference for each UCX collision mesh you want.
I’d imagine this should work when exporting form Max/Maya, but if you’re getting a crash in that program it may be better to just create your separate LODs and import them manually into UE4 using the Static Mesh editors menus.