Is it possible to set a trigger on a non-convex mesh collider?

I need to set a trigger on this custom object I made in blender. The issue is that I have to make the mesh collider convex in order too add a trigger to the object. This changes the hit box of the object which isn’t an option for me. I’m stuck and have no clue what to do… Can anyone help?

@xLerial it’s impossible…I don’t know how your model is but you can add basic collider on your model and checked istrigger

I really dislike the fact that you can’t just make it a trigger- but I guess a way to get around it that I found is to cut up the pieces of the model that don’t slump inward. I noticed that in Blender, you can export .obj files and separate pieces of one mesh by assigning different materials to specific faces. When exporting, you simply need to checkmark the “Material Groups” box.