Problem with making a custom collision

Development World Creation
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1

I’m trying to make a door frame and Unreal Engine’s auto generation for collision is terrible. So I decided to research other methods and came across a method where you would roughly sketch another object around your object and name it UCX_“namehere”. When I import it into unreal engine it works so I don’t see that collision object which is good but the collision is still nowhere how I wanted it to be. (auto generate collision is off when i import the model).

original model: Screenshot - f1902e871b3e5fa01eec7623a476e98a - Gyazo

collision box: Screenshot - ea794c891c59e27693307bb9d7ebb68e - Gyazo

unreal engine when imported: Screenshot - aac3c3a4060cf3e6ce8b62ad26c213ca - Gyazo the purple wireframe is the collision

Can anyone see what the problem is? Because no one else seems to be having this issue.

2

Unfortunatly the convex limit also affects custom. You should check “Use complex geometry as collision”, I’m wondering if there is any way to use that “complex geometry” from the UCX_ mesh.

3

The “collision box” screenshot does not show any convex form. Convex shape look like this () not like this (< - You have to split up your collision to convex forms (using Space and typing “Convex” in edit mode of Blender). You could name them UCX_mesh1_00 UCX_mesh1_01 UCX_mesh1_02 if you need more than one mesh. But your mesh looks like some UBX_mesh1_00, … would be better (using a few boxes) because boxes are simpler.