Shelby Goldstein: please never do this. This is the weirdest most absurd request. If they want collision they can throw a bounding box around something. This is so weird.

Joe Swindell: Can you elaborate why this is weird?

Tom Koch: Sure! Collision has huge performance implications. While there are many cases where some desired collision is wanted, we shouldn't assume EVERYONE wants that. Then you'd also have to decide what type of collision are we going to apply by default? Some models could get away with a simple static mesh collider, others would need very complex detection. It's a lot easier to add collision then to have to turn it off for every model. I think a lot of game designers also forgot there are many video / artist that use these models too. They have almost 0 desire for collision. Maybe I'm just old and grumpy!

Joe Swindell: Not having collision is a showstopper for game development, because a game developer would need to re-create simple collision for each of the asset which would take hours or days for 1 asset itself (some automated generated collision may work but many may not). With such high effort, many would get "proper" assets from somewhere else, such as "BigMediumSmall". BigMediumSmall assets comes with proper setup (including optimized collision) for game and film productions.

For film productions, you can select all the assets and then remove the collisions and it is not a showstopper; it would be a few steps inconvenient. Also for film, usually the focus is to create cinematic only visible to the camera, so usually collisions might not matters to much whether they are there or not. Megascan assets comes with collisions, and film makers are still using them and not complaining to remove collision by default in Megascan assets.

Joe Swindell: Thanks for getting back. I feel like this is a worthy discussion. Maybe it should be optional available when downloading a model or kit?

Tom Koch: I would look agree with Tom West comment on that simple collision would be ok. Collision is NOT a hard thing to add and acting like it is just just caters to novice developers. My collision preferences are different then yours. This is so much effort that could be put towards better improvements then someone to lazy to add a bounding box to a prefab.